NATURE No. 3908 SA T U RD A Y, SEPTEM BER 23, 19-44 Vol. 154 CONTENTS Scientific and Industrial Ressarch.— V 373 Fossils and Rock Chronology. By Dr. L. R. Cox 377 The Consequences of Frustration. By Dr. John Cohen 378 Berkeley’s Philosophical Notes. By Prof. A . D. Ritchie 380 An Astronomical Text-book. By Prof. H. C. Plummer, F.R.S.............................................................................380 Chemistry of W heat. By Dr. D. W . Kent-Jones 381 Meteorites or Springs as Geological Agents? By Dr. E. B. Bailey, F.R.S........................................................ 383 Pavlov’s W o rk on Higher Nervous A ctivity and its Development in the U.S.S.R. By Freda M. Thomas 385 The Royal Naval Scientific Service . . . . 388 Obituaries : Sir A rthur Smith Woodward, F.R.S. By Prof. D. M. S. W atson, F.R.S........................................ 389 Prof. S. P. Mercer, O.B.E. By Dr. A. E. Muskett . 389 Prof. Leo F. Goodwin. By Sir Robert Robertson, K.B.E., F.R.S......................................................... 390 Dr. M. C. Mott-Smith . . . . . 390 News and Views . . . . . 391 Letters to the Editors : Phytic Acid and Phytase in Cereals.— Sir Edward Mellanby, K.C.B., F.R.S........................................ 394 Catelectrotonic Potentials in the Dorsal Roots of the Spinal Cord.— Prof. John C. Eccles, F.R.S. . 395 Mechanism of Burrowing in Arenicola marina L.— Dr. G. P. W e l l s ..............................................396 Sewage Bacteria Bed Fauna in its Natural Setting. — Dr. LI. L l o y d ..............................................397 Imperial Forestry Institute, Oxford.— Prof. H. G. Champion, C.I.E. . . . . . . 397 Structure of Cellulose.— Dr. F. T. Peirce 398 Cloud Chamber Photographs of Penetrating Showers.— Dr. G. D. Rochester 399 Volcanic Contributions to the Atmosphere and Ocean.— Prof. C. A. Cotton . . . . 399 The Deflexion of Light and Relativity.— Prof. V. V. Narlikar . . . . . . . 400 The Commutation of Annual Subscriptions.— Dr. David Heron . . . . . . . 400 Mr. W . L. Sclater.— K. H. Barnard . 401 Occasional Whiteness of the Dead Sea. By Dr. R .t Bloch, H. Z. Littman and Dr. B. Elazari-Volcani 402 Indian University Architecture . . . . . 403 East African Archaeology. By M. C. Burkitt 404 Quartz Crystal Model . . . . . . 405 Colour Television . . . . . . . 405 Editorial and Publishing Offices M ACM ILLAN & CO., LTD., ST. M A R T IN ’S STREET, L O N D O N , W .C.2. Telephone N u m b er: W hitehall 8831 Telegrams : Phusis Lesquare London Advertisements should be addressed to T. G. Scott & Son, Ltd., Talbot House, 9 Arundel Street, London, W .C.2 Telephone Temple Bar 1942 The annual subscription rate is £4 10 0, payable in advance. Inland or Abroad. All rights reserved. Registered as a Newspaper at the General Post Office SCIENTIFIC AND INDUSTRIAL RESEARCH.-V I N our survey of the strategy of research we have already noted th a t, in addition to their functions in training the research workers required by the nation, the universities have an essential place in the organization for research, especially in regard to fundamental research. We have still to consider the tactics By which the fullest use can be made of the universities in this organization without detrim ent to the highest traditions and ideals of the universities, either in teaching or in the intellectual and spiritual service of the community. Furthermore, in con sidering the broad objectives towards which our programmes of research should be directed we have seen the need for some co-ordinating authority in our research structure, competent to review the broad programmes, to assess th eir importance and relevance to national needs and to determine the gaps which m ay require filling or the sectors which m ay require strengthening, either from the point of view of scientific advance or of the needs of society. We come now, therefore, to a fuller consideration of the type of organization which is required to serve our strategy and the tactical modifications or developments which m ay be desirable in the existing structure to fulfil our purposes more effectively. T hat existing structure has received strong criticism in recent months, and it is appropriate in the first place to consider th a t criticism in fuller detail. In the m ain such criticism has been concerned with the lack of co-ordination particularly w ith reference to the planning of research, as was pressed in the House of Lords debate last year and again in the debate on research and scientific knowledge in the House of Commons last April. Dr. P. Dunsheath urged in his Atkinson Memorial Lecture th a t industrial research requires a live central co-ordinating secretariat. That was also the main reason for the London Chamber of Commerce proposing, in its report on scientific industrial research, the establishment of a strong central research board to act as a co-ordinating and directing body for all research organizations and to be the link between the Government and the research activities of the country a t large. T hat criticism is also reflected in the statem ent of the Association of Scientific Workers, “A Post-W ar Policy for Science” . The survey of the organization of science contained in this statem ent leads to four m ain comments. First, the latest developments in our war-time organization have not in many fields satisfactorily linked research to requirements. Secondly, lack of central direction has produced a lack of balance in the development of science, as shown by the entirely disproportionate lack of development of biology as compared w ith the physical sciences. Third, the same cause, and the practice of private industry, lead to unnecessary and wasteful use of scientific effort. Finally, the whole scale and scope of research appears to be inadequate to supply the country’s needs after the War. Some of these points are made also in th e severe 374 N A T U R E criticism of the existing structure to be found in an article, “Research, Intelligence and A dm inistration”, by Prof. H arold J . Laski in a series of articles on “PostW ar Machinery of Government” in The Political Quarterly. Prof. Laski argues th a t there is little co ordination, no effective machinery for publicity, and no real attem p t to integrate th e work and needs of government departm ents w ith those of outside bodies. All m ajor scientific institutions—th e Royal Society, the Royal Institution, th e university laboratories, the B ritish Association—depend on private bene factions for their m ain opportunities. Of the sixteen points in which Prof. Laski finds the present organization defective, some are clearly m atters of tactics rather th an organization, though they m ay be due p artly to bad organization—for example, the inadequacy of th e salaries and status of Government research workers. Mostly th eir relevance in th is connexion is clear enough, and w ithout necessarily accepting their validity they may be briefly summarized as follows. The funds a t th e disposal of research are utterly inadequate. The p attern of adm inistrative organiza tion is awkward, lacking in integration and defective in comprehensiveness. The relation of research to adm inistration is gravely defective, and th e control of research is m ostly in the hands of men w ith no serious acquaintance w ith the possibilities of either natural or social sciences. There is no properly thought out policy for long-term research or any planned attem pt to use th e universities or bodies like the Royal Society to conduct independent investiga tions into problems w ith which th e com m unity is concerned. No proper m ethod exists in any government departm ent for securing awareness of relevant work achieved by scientific workers in foreign countries— a defect which is specially m arked w ith regard to the U.S.S.R. The present system also sacrifices the endowment of research to th e easy m ethod of direct subsidy to industry, indicating a tendency to the short-term in place of th e long-term view, which in such fields as n u tritio n is clearly detrim ental to the national interest. Relations between th e Government and the social and natural sciences are in Prof. Laski’s view dominated by the theological inheritance of our society and by th e individualistic approach. Again, he takes exception to th e age of those who are charged w ith th e direction of these relations and he also points to th e dangers in th e implications of the relation between th e adm inistrator and industry in the existing system. Finally, he comments on th e inherent inertia or desire of departm ents to let well alone, and on the slight opportunity for th e research worker in th e natural or social sciences to show his powers as an adm inistrator save by a c c id e n t: all the vital places are in effect reserved for th e adm inis trativ e grades of th e Service. Now th a t is a formidable list, and th e gravamen of th e indictm ent is increased b y th e fact th a t most of the criticisms are substantiated b y comments in Parliam entary debates and in th e numerous reports and papers on scientific and industrial research from S e p t e m b e r 23, 1944, v o l. 154 different sources which have appeared during the last year or so. Prof. Laski’s thought, however, is very clearly coloured by his political approach, as is evident from th e nature of his observations on the m ajor changes th a t are required. Furthermore, his preoccupation w ith the political—and it might be argued th e p arty—aspect of the problem has led him to ignore the m erits or advantages of the present system, and the principles which our consideration of th e strategy and objectives of research has already led us to postulate. Prof. Laski’s conclusion indicates th a t he is con cerned more w ith a political thesis th an to elucidate the form of organization which will best serve the principles and objectives which have been adum brated in our survey of the strategy of research. The validity of his particular criticisms m ay be adm itted and measures m ust be adopted to guard against th eir effects in whatever type of organization of research m ay be set up. The nature of th a t organization, however, should not be dictated prim arily by political considerations b u t by the requirements of research and the principles which in practice have best secured its effective im plementa tion, even though the tim e m ay be ripe for im partial re-exam ination of the whole question of the structure of industry from the point of view of social and economic efficiency and research. T h at is the main reason why, in spite of wide spread recognition of m any of the defects in the present organization, there has been little evidence of a demand for fundam ental change. Prof. A. E. Trueman in his pam phlet “Science and the F u tu re”, for example, examines the situation far more objectively th a n Prof. Laski, and concludes th at, so far as the planning of science is possible, it can su it ably be achieved w ithin the organization already available. The existing organization is loose and flexible, b u t provides a sound basis for extending a working combination of Government assistance and direction w ith the help of voluntary workers. While it makes possible a general control, it leaves a large measure of individual liberty, and in particular the intellectual and professional freedom which is vital. The development or modification of existing institutions which w ithin their respective spheres are effective is so in accordance w ith the tradition of B ritish methods th a t strong reasons should be forth coming before we proceed to discard them entirely and replace them by fresh instruments. No such reasons are forthcoming in Prof. Laski’s criticism, which, it will be noted, is in the m ain of the adm inistra tive side. Much of it, moreover, is in keeping with the essential point in the criticism of the machinery of government to be found in the reports of the Select Committee on N ational Expenditure, in the Planning Broadsheets and in the earlier report of the Haldane Committee : we need effective machinery for the planning and co-ordination Of general policy. In research as elsewhere, our organization must provide, in the words of the Haldane report, “for th e organised acquisition of facts and information, and for the systematic application of thought, as no. 3908, S e p t e m b e r 23, 1944 N A T U R E preliminary to the settlem ent of policy and its sub sequent adm inistration” . I f a modified or developed organization meets th is requirement we shall have- m et th e m ain points of Prof. Laski’s criticism, in so far as th a t is properly relevant to organization and is not concerned either with the quality or ability of adm inistrative per sonnel or w ith th e financing or endowment of research. There are, however, other and even more v ital con siderations to be taken into account before deciding on w hat form our structure of research should take, or what modifications m ay be required in th e existing organization. F urther, there are certain special problems a t the present tim e which m ust be handled by th a t organization and for which new instrum ents may be required. First, it follows from w hat we have already said regarding the precedence of personnel over organiza tion, th a t our organization for research m ust be such th a t not merely does it secure th e most effective use of research workers in furtherance of our research objectives, b u t also it m aintains th e enthusiasm and initiative and originality which are vital factors in creative work. To keep the adm inistrative side im aginatively al ive to such issues and sensitive to trends of opinion may well involve further attention to the question of intelligence as p a rt of our research structure, but th a t aspect can be more profitably considered w ith reference to th e broader question of education and information in relation to the utilization and support of research. This question of freedom in relation to organization and planning is also of vital importance in considering some of those problems in th e organiza tion of research which are specially prom inent a t the present tim e, particularly in regard to th e place of the universities. As has been pointed out in a recent article in The Economist, all the evidence points to a growing dependence of our universities upon State assistance as compared w ith fees or private and independent endowments. T hat circumstance of itself would demand extra vigilance to ensure th a t there is no weakening of the independence of the universities and of the essential freedom of inquiry and of teaching. The desirability, if not the necessity, of relating the universities more intim ately w ith th e research effort of th e country as a whole so as to facilitate the planning of th a t effort more effectively, and th e obvious importance of some further measure of co-operation between th e univer sities themselves so as to secure the adequate endow ment and staffing of whatever additional schools of research or teaching may be required while avoiding redundancy, also compel consideration of new measures of reorganization from m uch the same point of view. These are the reasons th a t have led to some attention being redirected to th e constitution and functions of the University Grants Committee. T hat Committee, Mr. Attlee stated, has recently been reconstituted so as to perm it the association w ith it of persons whcse services are not actively engaged in connexion w ith a university. In the opinion of some, such as Sir Charles G rant Robertson, such a re 375 inforced Committee should be able to sift the pro gramme of development of each university and to analyse and value th e needs not only of each institution b u t also of university education as a whole. I t should probably also be competent to co-ordinate special departm ents so th a t there will not be avoidable duplication or overlapping, and a single university m ay be selected to be the institution where a particular subject can be most efficiently pursued. T hat opinion is not universally shared. The British Association Committee has suggested th a t the U niversity Grants Committee m ight function as a Committee of the P rivy Council instead of, as a t present, directly under the Treasury, b u t its report also proposed the establishment of a universities’ advisory council, entirely free from Government control. T hat was also the proposal of the P arlia m entary and Scientific Committee and of the Association of U niversity Teachers, and has received some support in the more recent report, “Science in th e Universities”, issued by the Association of Scientific Workers. While, however, the Association of U niversity Teachers visualizes the proposed council as possessing advisory functions only, some means of providing more effective central control appears to be required, as the Parliam entary and Scientific Committee and the Association of Scientific Workers clearly recognize. The Association of Scientific Workers contemplates th a t the power of such sub-committees would be lim ited to advising when and where new departm ents were needed for the investigation of newly opened fields of knowledge. The U niversity Grants Com m ittee would normally act on th eir advice and provide funds accordingly, and the research com m ittee which it is proposed each university should establish to watch over departm ental activities and present a to tal research budget to th e university for transm ission to the U niversity Grants Committee would also m aintain contact w ith such sub-com m ittees. This scheme would avoid rigid planning and divorce the direction of research activities from th e Treasury, b u t it does not appear to provide a means of dealing effectively w ith the problem of present redundancy to which Sir Ernest Simon has so pointedly directed attention. We m ay postulate, therefore, th a t in regard to the universities our organization for research m ust pro vide some effective means for consultation and co operation between th e universities themselves, whether through th e development of the U niversity Grants Committee, through a universities advisory council or in other ways. N ext, it m ust establish right relations between the universities and public bodies in which th e universities recognize th a t they are in large p a rt public institutions w ith public duties to perform, in providing the education and producing th e graduates the country requires. The means pro vided for both these purposes m ust safeguard the independence of th e universities and of the fullest freedom of investigation and teaching while securing responsiveness to the creative forces a t work in the nation as a whole. 376 NATURE In this question of contact between th e universities and the community in th e organization and planning of research, contact w ith industry is of special im portance. We have stressed th e importance of such contacts from th e point of view of personnel, but more organized contacts are required from th e point of view of th e planning of research itself. T hat is the significance of th e Jo in t Council set up by th e U niversity of Manchester and th e Manchester Chamber of Commerce. Looking a t the sphere of research for which the Government m ay be held directly and prim arily responsible, it has long been recognized th a t th e work required to m aintain accurate standards of length, tim e, weight, etc., is properly a Government respon sibility. Research in such sciences as astronom y and geology also requires a large measure of Government security. Similarly, it is right th a t such specialized forms of industrial research as factory lighting and ventilation, and on industrial safety should be carried on largely under Government auspices and financed out of public funds. Much the same applies to research into questions of soil erosion, forestry, plant diseases, w ater supply and m any other problems in th e domain of agriculture or health which have a social as well as an economic bearing. I t is, of course, not easy to draw precise lim its as to the extent of Government responsibilities. Already a number of Government research stations, such as those concerned w ith building, fuel, food, agriculture, are in effect carrying out industrial research, but generally speaking it m ay be said th a t this applies to industries which are fundam ental to th e life and well-being of the nation. I t is to be expected th a t the Government will always have a special interest in the industries serving these fundam ental needs, and th a t there should be adequate provision of research into such problems under Government au s pices, especially when the industries concerned are not easily able to organize such research themselves. From this point of view the D epartm ent of Scientific and Industrial Research has unquestionably proved its value and should be retained in our structure of research. B ut over a far wider field th e Government should be constantly on w atch for new developments in scientific knowledge which m ay be of economic or social value to the nation. I t was very noticeable in the House of Commons debate last April th a t research into medical and health problems, even where they closely affect economic productivity, was largely over looked. Nor was anything said of economic a n d . social research, and particularly the use of scientific methods in the study of relations between hum an beings. I t is clear th a t even from the point of view of the organization of research under direct Government auspices some means of ensuring a wider view and of effectively correlating th e work of th e Advisory Council for Scientific and Industrial Research, the Medical Research Council, th e Agricultural Research Council and the Colonial Research Council is essential, and th is m ust cover also th e whole social and economic field and provide th e Government w ith the best im partial scientific advice on all m atters of Septem ber 23, 1944, v o l . 154 industrial development on the application of scientific knowledge. Obviously such an organization capable of supplying the necessary central direction m ust be related to the Cabinet and to the policy-making bodies of the various sections of the Government if it is to be aware of the national problems concerned. These could well be the essential functions of the Scientific Advisory Committee of the W ar Cabinet, and Dr. H aden Guest’s proposal th a t this should form a perm anent p a rt of our machinery of Govern m ent m ight in principle meet the need, though its term s of reference as set forth in the W hite Paper on Scientific Research and Development m ust be enlarged and the details will require elaboration. The Association of Scientific Workers has suggested the establishment of a N ational Research and Develop m ent Council responsible to the Lord President of the Privy Council. The suggestion of a Ministry of Science is unlikely to be as satisfactory for reasons which were well stated by Mr. Attlee in a reply to Mr. W ootton-Davies in the debate. Co-ordination is not the same as centralization, and it is im portant to retain as much flexibility as possible in our organiza tio n and to aim a t the permeation of all Departments of State w ith some understanding and appreciation of the scientific method and outlook. W hen we have thus provided for the effective organization of research in the universities and under direct Government auspices there will remain a large field of applied research to be undertaken by private industry. I t m ust be recognized th a t here there can be no question of formal organization from outside, any more th a n there can be such organization of fundam ental research a t the universities. In the discussions on industrial research during the last two years, while it has been clearly recognized th a t the Government has certain responsibilities in this field and th a t neglect of research has been an im portant factor in the depressed condition of some industries, w ith consequences in the national economy which no Government can wisely ignore, there has been no suggestion th a t the Government should do more than provide the most favourable conditions for stim ulat ing research, whether in its fiscal and taxation policy and by the allowances made for obsolescence or by its attention to the supply of scientific workers through an adequate policy of scientific education. The essential function is th a t of encouragement, and the Nuffield College statem ent firmly rejects the idea of direct financial aid to the research expenditure of private firms, beyond w hat may be granted in the form of ta x remissions. One reason for rejecting any such proposal is th at no such concession would be made on general lines w ithout extending public control over the research thus aided, and such control over industrial research in the direction of the discovery of new products and new processes or on the improvement and simplifica tion of existing processes and the discovery of new raw materials would probably be both unwelcome and impracticable. None the less, industrial research m ust be included w ithin the general framework of the nation’s organization for research, partly because of this recognized responsibility of the Government no. 3908, S e p t e m b e r 23, 1944 N A T U R E for encouraging such research in appropriate ways, partly also because of the S tate’s responsibility for seeing th a t th e field is adequately covered, and partly for the reason th a t th e invaluable interchange of personnel between pure and applied research and the contacts which are so stim ulating cannot be secured w ithout some regard on th e p a rt of th e State to the general conditions of industrial research. There is another reason for some closer considera tion of applied or industrial research by th e State. We have already seen th a t in certain industries fundamental to th e national welfare th e Government has already in its own research stations assumed direct responsibility for much of th e research required. Suggestions have also been made th a t there is need in Great B ritain for institutions of the type of the Mellon Institute of Industrial Research or the Massachusetts In stitute of Technology to provide either an organiza tion in which research workers can be delegated to study specific industrial problems or to cover problems which are common to m any industries but th e con cern of none in particular, as, for example, chemical engineering. The problem is well p u t in th e Nuffield College statem ent, b u t th a t statem ent makes no recom mendation th a t public funds should be applied to this purpose. Clearly any such project m ust be care fully examined from th e point of view of existing research stations or research associations and their development, and also in regard to developments a t the universities. No decision on such a point could well be reached except a t th e level of such a Scientific Advisory Committee as we have already adum brated. The place of th e research associations demands a little further attention. D oubts have frequently been expressed as to th e extent of their effectiveness, b u t in view of th e num ber of small units in m any industries and th e growing cost of equipm ent, co operative research of th is type m ust probably find a more or less perm anent place in our research organization. Large laboratories m ay be required for research both of th e convergent or divergent type, and it m ay also be advantageous for some of the smaller industries to attach themselves to research institutions m aintained by larger industries which are technically related to them . Moreover, considera tion m ust also be given to th e question of th e extent to which th e research associations themselves would be responsible for some of th e fundam ental research required, thus supplementing th a t in progress a t the universities. The assistance or encouragement which th e State may be expected to give to industrial research will thus vary w ith th e nature of th e industry and w ith the size of the constituent firms. I t is thus imperative th a t our organization should be flexible and th a t th e Government policy should be as fully informed as possible—a further and fundam ental reason for a co-ordinating secretariat and inform ation centre for industrial research. No scientific advisory council can function effectively unless it is provided w ith adequate and efficient fact-finding instrum ents unon which its policy can be based. 377 FOSSILS AND ROCK CHRONOLOGY Index Fossils of North America A New W ork based on th e complete revision and reillustration of G rabau and Shim er’s “N orth American Index Fossils” . B y Prof. H ervey W. Shimer and Prof. R obert R . Shrock. Pp. ix + 837 (303 plates). (New York : Jo h n Wiley and Sons, Inc. ; London : Chapman and H all, Ltd., 1944.) 20 dollars. CENTURY and a quarter have passed since W illiam Sm ith’s “S trata Identified by Organized Fossils” (1816-19), w ith its figures of some 160 B ritish fossils, made the long-delayed announcement of the discovery indicated in its title. The subsequent correlation of sedimentary rocks throughout the world has largely depended on the application of this dis covery. Included microfossils now often enable the oil geologist to ascertain the horizon of the smallest sample from one of his borings ; coal seams m ay be identified by fossil shells in the associated shales. In such ways has the study of fossils become of great practical help to mankind. There is no doubt, however, th a t the field geologist is now very diffident about attem pting to deal per sonally w ith any fossils he m ay collect, so extensive is the literature and so intricate are m odem schemes of classification. The work under review is a notable attem p t to remove such difficulties by presenting an epitome of modern knowledge of American inverte brate palaeontology. Although nominally a revised edition of Grabau and Shimer’s “N orth American Index Fossils” (1909—10) it contains so much new m atte r th a t it m ay well claim to rank as a distinct work. Many leading American palaeontologists have collaborated in its preparation. An index fossil, we are informed in the introduction, is “one which identifies and dates the strata or suc cession of strata in which it lies” , but since ideal index species—forms w ith restricted stratigraphical range and broad geographical distribution—are comparatively rare, “a genus which has narrow stratigraphic range and rath e r broad geographic distribu tion is now considered an index fossil”. N otw ith standing its title, however, the work is by no means restricted to genera of lim ited range, for “some genera w ith long vertical ranges have been selected, not because of any particular value as index fossils b u t because they are common”, and it has, moreover, “been thought proper to give some representatives of each of the main taxonomic groups which m ay be encountered in th e field” . The prim ary object of the work is thus to serve as a guide to the identification of genera, although it will enable m any species, some of use as s tra ti graphical indexes, to be named incidentally. B y its aid it should be found possible to ascertain to w hat formation any assemblage of American fossils should be referred, b u t in subdivided formations it is no guide to the very precise horizon. Detailed zonal work, such as has been carried out a t m any horizons of the stratigraphical sequence by the intensive study of such groups as the graptolites of the Lower Palaeozoic and the ammonites of the Mesozoic, receives no m ention. The inclusion o f a glossary or table of form ational term s adopted in the work would have been useful, for most non-American (and probably m any American) readers will probably be as ignorant o f th e positions of such formations as A 378 N A T U R E the “K inzers” , “Hosselkus” , “Steam boat” , and “Pinecrest” as is the reviewer. Grabau and Shimer’s work consisted of two volumes totalling 1,762 pages ; its successor contains more subject-m atter, b u t consists of a single volume of 837 pages. The reduction, probably enforced by w ar-time paper restrictions, has been accomplished by th e adoption of a larger form at and more closely spaced typo (in double columns), and b y the grouping of all illustrations in plates. Considerable additions have been p a rtly provided for by th e omission of artificial keys to genera and species (such keys seldom prove of m uch use to th e palaeontologist), by the curtailm ent of specific descriptions, and by the omission of chapters of a general character. Owing to their com paratively insignificant type, names of orders and suborders unfortunately appear sub ordinate to th e generic names. The illustrations, 9,400 in number, occupy no fewer th a n 303 plates, and their general standard is excellent. Their p ro fusion, even if it has m eant th e sacrifice of a certain am ount of text, is am ply justified. In no other work will the palaeontologist find assembled a series of figures illustrating so m any genera of all groups. The figures are p a rtly new and p a rtly reproduced from standard monographs. The search for oil in m any p a rts of the world during recent years has given an im petus to the study of m any groups of organisms, particularly those of microscopic size, th e value of which as stratigraphical indexes was formerly unsuspected. The Foram inifera are a case in point. In the m uch enlarged section dealing w ith th is group J . A. Cushman describes the smaller forms, L. G. Henbest th e Fusulinidae of the U pper Palaeozoic, and W. S. Cole th e Orbitoids of the Upper Cretaceous and Tertiary. In other new sections E. 13. Branson and M. G. Mehl deal w ith the Conodonts and a group of specialists w ith the Ostracods. A lthough fossil plants as a whole do not fall w ithin th e scope of th e work, a concluding chapter contains notes on a few such remains, p a r ticularly Charophyta, likely to be found in rock samples searched for other microfossils. Far-reaching changes in classification m ust always present a problem to writers of reference books. K iderlen’s inclusion of the Conularida in th e Ccelenterate class Scyphozoa, although far from con vincing, is accepted, b u t the im portant work of Kozłowski on th e affinities of th e Graptolitoidea (which he transfers from th e Ccelenterata to the class Pterobranchia of th e Hemichorda) is ignored, as is also W ithers’s separation of Turrilepas and its allies from the Cirripedia as a new group, th e Machasridia. A new section on th e Crinoidea, th e work of R. C. Moore and L. R . Laudon, is one of th e outstanding features of th e work ; particularly notable are its clear line-drawings illustrating generic morphology. G. A. Cooper’s section on th e Brachiopoda, also new, deals mainly w ith th e Palaeozoic genera, those of the Mesozoic receiving scant mention. The section on the Pelecypoda has been curtailed w ith only slight revision. Some genera (for example, Ptychom ya) of real value as index fossils are now om itted. Much more m ight have been said about th e stratigraphical value of th e R udists (of importance in Texas and Mexico) and of certain groups of Trigonia. Among the genotypes cited th a t of A nthracom ya (“Naiadites elongata Dawson” ) is incorrect, th a t of Pecten (“P . adscensionis Osbeck” ) very debatable, and th a t of Jan ira (“J . nitemudia,” [? intermedia]) hopelessly misprinted. Revision of th e Gastropoda section has S e p t e m b e r 23, 1944, v o l. 154 m ainly affected the Palaeozoic forms, dealt w ith by J . Brookes K night. The section on the Trilobita, in which several authorities have collaborated, gives descriptions and figures of a large num ber of new genera founded in recent years. The high price of the work no doubt results from the profuseness w ith which it is illustrated. European palaeontologists will find it m ost valuable for reference notw ithstanding its purely American scope. L. R . Cox. THE CONSEQUENCES OF FRUSTRATION Frustration and Aggression By John Dollard, Neal E . Miller, Leonard W. Doob, O. H . Mowrer and R obert R . Sears, in collaboration w ith Clellan S. Ford, Carl Iver H ovland and Richard T. Sollenberger. (International L ibrary of Sociology and Social Reconstruction.) Pp. ix+ 150. (London : Kegan Paul and Co., L td., 1944.) 1Os. fid. net. IG H T members of the Yale In stitute of Human Relations have co-operated to produce this book. The result is not a mere juxtaposition of unco ordinated viewpoints b u t a u n ity of aim and con sistency in presentation which m ake the m ultiple authorship alm ost undetectable. W hatever judg m ent one m ay m ake about the value of the hypo thesis elaborated in the book, there can be little doubt th a t the intim ate collaboration of a team of specialists, each w ith a distinctive training, is a profitable way of examining a problem which has no clear-cut frontiers and which does not fall neatly into one of the conventional com partm ents of social study. The authors begin by indicating the m any diverse forms of aggressive behaviour ungeneralized under any one explanatory principle, and to meet this apparent need they set up a twofold hypothesis, first, th a t frustration always leads to aggression and, secondly, th a t aggression is always due to frustra tion. They proceed then to show how the theory provides one conceptual framework for a variety of hum an phenomena including the process of socializa tion in infancy and childhood, the adjustm ents necessitated in adolescence, criminal behaviour, the effects of differences in political organization and the structure of a prim itive society. The frustration-aggression hypothesis, in one form or another, is not new. This is recognized by the authors, who attem p t to go farther th an earlier theorists by giving special prominence to w hat they regard as the inevitable consequence of frustration on one hand and the sole cause of aggression on the other and then scrutinizing the explanatory value over a wide field of a hypothesis stressing this twoway relation. Apparently, it was considered less im portant for the purpose to examine the validity of the assum p tions underlying the hypothesis th an to deduce corollaries which follow from it. Since the hypothesis is presented not w ith any finality, b u t tentatively, to stim ulate and guide further research, this attitude can be justified. Nevertheless, the effect will be to m ake m any readers regard the book as an exercise in deductive ra th er th an inductive reasoning without giving them sufficient confidence in the inductive foundations on which it is based. E No. 3908 , S e p t e m b e r 23, 1944 N A T U R E 379 To make prem ature deductions from a generaliza upon the m ost obvious and im portant kind of tion insecurely founded inductively leads to diffi aggressive behaviour of all, namely, collective culties. Thus, on the principle th a t aggression is a aggression or warfare. A n early promise (p. 19) of catharsis th a t reduces instigation to all other acts th e authors to bring “wife-beating and w ar” w ithin of aggression, together w ith the principle of displace a common universe o f discourse appears to be over ment, it is deduced th a t various forms of aggressive looked in subsequent pages. The only serious refer ness should vary inversely if original frustration is ence to the subject is the fam iliar observation (p. 64) held constant. One has difficulty in reconciling this th a t in view of th e process of displacement of with the continued aggression in m any directions of aggression from in-group to out-group, “one, though aggressor nations whose original frustration has p re only one, of the conditions of avoiding w ar is to sum ably remained unchanged. Aggressive acts fre diminish intra-social fru stration” . I t m ay be noted quently seem to have a way of reinforcing the instiga in passing th a t there are weighty considerations tion to other such acts ra th e r th a n to operate in against any view which sees in a group phenomenon inverse relation to them . like m odem warfare merely a sum m ation of the Until fairly recently th e belief th a t aggression is effects of the frustrations of individuals. F or th a t determined by a prim ary instinct was widely accepted. m atter, it is exceedingly doubtful whether individual This instinct was regarded as existing, as it Were, in frustration or, indeed, any process of individual its own biological right and m anifesting itself, so to behaviour as such, can be given any prim ary signific speak, autonomously. Thanks to a growing under ance in explaining an organized group phenomenon standing of the n ature-nurture issue, aggressiveness like modern war. is now thought of more as an acquired characteristic The authors’ treatm ent of crim inality calls for a rather than as an inborn tendency. The authors’ view few words of comment. They regard the incidence th at all aggressive behaviour is due to th e im pact of of crime as a function of the discrepancy between the environment upon the individual m ay therefore frustration, on one hand, and anticipation of punish be welcomed in th a t, as a theory, it is subject to m ent on the other. I f both these factors are of' verification and tries first to exhaust th e possibilities high or if both are of low degree, or if the former is of explaining in term s of known before resorting to low and the la tte r is high, then crimes will tend to unknown categories. be few ; if, however, frustration is high and anticipa However, certain objections to th e traditional tion of punishm ent is low, then crimes will tend to theory of aggressiveness as an innate tendency still be many. The difficulty here, as indeed with the hold against the theory under consideration. For subject as a whole, is to find some measuring scale these objections were usually based on th e observed for the basic variables. W hat is a unit of aggression variability of behaviour in different environments, or of frustration ? Can we ever say th a t one person inexplicable genetically, and not in accord w ith a is twice as frustrated or twice as aggressive as a n conception of m ind as a rigid set o f predeterm ined other ? This difficulty is fundam ental and lies a t the dispositions. The present hypothesis retains this root of m ental measurement. So long as the investi element of rigidity although it abandons the notion gator is content w ith statistical units or abstract of innate aggressiveness. Now while there is d oubt frames of reference for classifying hum an behaviour, less some relation between frustration and aggression, th e difficulty can be evaded even if the results are m any m ay wonder whether it is justifiable to lay it psychologically not very satisfying. B ut the authors down even as a hypothesis th a t frustration always here are more ambitious. They wish to find a few leads to aggression. Such a theory implies an essen common psychological denominators under which to tial biological connexion holding between the two embrace all the diverse phenomena of crime. They processes. B ut m ay not th e relationship be culturally tr y to do this in an indirect way which is not very rather th an biologically determ ined ? I f so, it is an convincing. Crime is assumed to be a species of ‘accidental’ rath er th an a necessary association. aggression simply because it is supposed to be a Before this possibility can be wholly excluded, it response to frustration. This supposition is, in turn, needs to be dem onstrated th a t no individual can based on correlations between the incidence of crime respond to frustration unaggressively such as would and economic, vocational and educational status, seem to be the case, for example, in m aternal con intelligence, age, health, physical appearance and duct in general or possibly in ‘turning th e other other factors. To use these la tte r observations and cheek’ or in masochistic behaviour. The eagerness th e ir interpretation as evidence of the frustrationto find a ‘law of N atu re’ has evidently tem pted the aggression hypothesis is to beg the question. More investigators to presume, too hastily, th e existence of over, a large proportion of crimes such as larceny or a necessary relationship. Since perfect interdepend offences against property w ithout violence do not ence of two variables rarely, if ever, seems to be fall under the authors’ definition of aggression as “an encountered in hum an measurem ent, th is alone would act whose goal-response is injury to an organism suffice to cast doubt on the validity of the hypothesis (or organism surrogate)” . as it stands. The fact th a t the divorced population provide a There is yet another difficulty. According to th e disproportionate num ber of convicted persons is re view p u t forward, frustration and aggression appear garded by the authors as “the m ost dram atic demon to be opposite ends of one continuous event or ex stration of all of the role of frustration in the causa perience w ith an arb itrary line of division between tion of crim inality” (p. 91), the assumption being them, for if th e relationship between th e two pro th a t divorce is usually a frustrating event. I t seems cesses is invariant, who is to say when the experience to be overlooked th a t divorced persons are a selected of frustration term inates and the impulse of aggressive and possibly m aladjusted group and, hence, w hat ness begins ? I t is doubtful w hether anything is ever factors lead to the break-up of their marriages gained by defining aggression ‘independently’ o f frus m ay also contribute to their increased criminality. tration and w hether it is logically justifiable to do so. While feeling th a t the main hypothesis has not The limited scope of the hypothesis is brought out been adequately form ulated, the reader will be am ply m ost, perhaps, in the relatively little light it throws rewarded by the m any illum inating rem arks scattered 380 N A T U R E through th e pages, particularly in Chapters 4 and 5. One example m ay be mentioned. The authors point out th a t th e cathartic effect of aggressiveness which follows frustration serves only to reduce th e secondary instigation produced by frustration not, as is com monly assumed, the strength of th e prim ary instiga tion which suffered frustration. The frustration-aggression hypothesis, even with lim ited scope, is not simply of academic interest. All those charged w ith th e care and upbringing of children, w ith th e managem ent of personnel in the various spheres of industrial and social life are fre quently confronted by individuals in th eir charge who react in a hostile m anner to unavoidable fru stra tions. This clear discussion of the problems of ad ju st m ent which individuals m ust face in any society should be of m uch practical value. F u rth e r verifica tion o f th e theoretical basis will be welcomed. J o h n Co h e n . BERKELEY’S PHILOSOPHICAL NOTES S e p t e m b e r 23, 1944, v o l. 154 and indexes. The value of these can be seen by taking an example a t random. . E n try No. 526 reads : “Locke says the modes of simple Ideas besides ex tension and num ber are counted by degrees. I deny there are any modes or degrees of simple Ideas. W hat he term s such are complex Ideas as I have prov’d by Green” . This is cryptic enough. However, given the correct reference to Locke, to several other entries in the “Commonplace Book” and to Berkeley’s published work, we can then see how Locke’s te n ta tive, stum bling b u t very suggestive analysis of per ceptual processes stim ulated Berkeley’s more precise m in d ; how Berkeley gradually clarified his own thinking and terminology to produce a different, far more definite (perhaps more erroneous) statem ent. Prof. Luce provides a guide to these interconnexions th a t will save readers much hard work and many m isunderstandings. Students o f Berkeley for m any generations to come will be grateful to Prof. Luce for this fine piece o f work, to his publishers and printers who have shown th a t good craftsm anship is still possible after nearly five years of to tal war, and to Trinity College, where Berkeley’s thinking was fostered and where his memory is still honoured as it should be. A. D. R i t c h i e . Philosophical Commentaries, generally called the Commonplace Book By George Berkeley, Bishop of Cloyne. An editio diplom atica transcribed and edited w ith In tro duction and Notes by Prof. A. A. Luce. Pp. xlii + 486. AN ASTRONOMICAL TEXT-BOOK (London and E dinburgh : Thomas Nelson and Sons, Elementary Mathematical Astronomy L td ., 1944.) 73s. 6d. net. B y C. W. C. Barlow and Dr. G. H . Bryan. Fifth H E m anuscript generally, b u t inaptly, called “Berkeley’s Commonplace Book” is a document edition, revised by Sir H arold Spencer Jones. Pp. viii+ 388. (London: U niversity Tutorial Press, of unique interest in philosophical literature. Berkeley Ltd., 1944.) 12s. 6d. took his B.A. a t T rinity College, Dublin, in 1704 a t H IS book belongs to the peculiar class inter the age of nineteen. In 1709 and 1710 he published m ediate between the popular work on astronomy his “New Theory of Vision” and his “Principles of on one hand and the serious technical treatise on th H um an Knowledge” , th e two works on which his philosophical fame has always rested. Berkeley’s other. The scope of the class is otherwise not easily ideas were novel, b u t very clear and articulate, and defined in precise term s. Sir R obert Ball, who made skilfully argued in these books. The only thinkers a distinctly elegant contribution to it, confessed th a t to compare w ith him , who advanced so far so quickly, th e effort had caused him great and apparently u n are Descartes and Hum e. I t is m ost fortunate th a t expected difficulty. Simon Newcomb, whose work we can examine th e notebook in which he recorded on the popular side had been as conspicuously success his philosophical reflexions during th is short period ful as his labours in m athem atical astronom y were of intense m ental activity. Prof. Luce considers th a t of th e m ost distinguished, once ventured into a th e notes were Written during 1707-8, and th a t similar field belonging to neither. In acknowledging Berkeley probably h ad before him a prelim inary frankly an error brought to his notice he showed himd ra ft of his theories. Thus th e “Commonplace Book” self-conscious of a pitfall to which the expert is liable shows how his first thoughts were altered and im in the attem p t to make a statem ent adapted to the proved until they attain ed their first published form, intelligence of readers less gifted th an his usual audience. never greatly altered alterwards. N either of the two original authors of the present The m anuscript was discovered by Campbell Fraser and published in 1871 in his edition of Berkeley’s text-book belonged to the ranks of the professional works. U nfortunately, Fraser failed to notice th a t astronomer. T h at it possessed m erits of a distinct th e two notebooks Berkeley used had been bound kind is attested by the fact th a t it has outlived half together in th e wrong order, so th a t his te x t is con a century, during which it has reached a fifth edition, fusing. G. A. Jo hnston’s edition of 1930 corrects while the num ber of impressions demanded has been the principal error in chronological order. Prof. Luce, far more numerous. The th ird edition (1923) received however, finds th a t Johnston has still got some entries the revision of Dr. A. C. D. Crommelin. B ut it may be misplaced. There are also other inaccuracies in the suspected th a t the survival of the book is due in no two earlier texts. Moreover, th e original document small degree to the English m ania for examinations was damaged by sea w ater when Berkeley had it and the demand fostered thereby. I t has now re w ith him on his travels. P a rts were difficult to ceived a fresh lease of life a t the hands of a most decipher in F raser’s day and are now much worse. eminent editor who has done his work well. Yet Prof. Luce has therefore undertaken to produce a there remain traces of th a t aridity which is a natural complete type-facsimile of all th e entries of philo outcome of its origin. I t m ay be hoped th a t when sophical interest, w ith erasures, alterations and later war-time restrictions are removed an editor so rem arks all in place. In addition he has provided eminently qualified will see his way to expound the copious and very necessary notes, cross-references subject w ith greater freedom in his own manner. T T no. 3908, S e p t e m b e r 23, 1944 NATURE In 1892, when th e book first appeared, astronom y seemed to have reached a peculiarly static position, in re? lity th e unsuspected precursor of an outburst of creative activity. In particular, th e N autical Almanac seemed to have attain ed a settled form u n likely to be changed for years to come, an d w ith it the outlook of th e student was bounded accordingly. Now the conditions have changed, including th e definition of tim e ; th e N autical Almanac itself is not the same, and it has been supplem ented by the abridged edition for th e use of seamen and th e A ir Almanac for the special needs of air navigation. Moreover, th e students are n o t th e sa m e ; their interests are professional and no longer merely academic. Thus th e opportunities which face the instructor in astronom y are vastly more interesting than existed h alf a century ago, and they are different in kind. • The more spectacular modern changes in th e sub ject-m atter of astronom y itself m ay seem to be associated w ith th e introduction of physical m ethods and ideas. B u t th e Astronomer R oyal has confined his revision to bringing up to date th e exposition of those fundam ental principles on which th e whole subject depends, to rearranging related sections and to providing a sound introduction to th e m ethods of sea and air navigation now in use. An enlarged table of astronomical constants has been added. B u t in th e main the substance of th e work rem ains as in earlier editions. In abstaining from incursions into astron omical physics the editor is doubtless justified by the proved success of an existing model. Even w ithout transgressing th e lim ited ideas of th e nineteenth century some relief to the purely goniometric line of argument m ight be found in the conception of radial velocity and in th e rectangular co-ordinates appro priate to photographic projections. W ithout going so far the Astronomer Royal has greatly improved the structure of th e work and made m any necessary alterations w ithin its fam iliar framework. B u t if in happier days a fresh edition is contem plated, one is tem pted with all respect to exclaim w ith H am let, “O ! reform it altogether” . In short, let it be a new work inspired w ith the aim of serving as th e m aster, not the servant, of the examiner. H . C. P l u m m e k . CHEMISTRY OF WHEAT The Constituents of Wheat and Wheat Products By Prof. C. H . Bailey. (American Chemical Society Monograph Series, No. 96.) Pp. 332. (New Y ork : Reinhold Publishing Corporation ; London : Chap man and H all, L td., 1944.) 6.50 dollars. H E object of reviewing a book is to give readers some information on th e au th o r an d his au thority for writing on th e particular subject, to indicate scope of the book and to give an im partial evaluation of the value of th e work. This is not a particularly difficult task in this case. C. H . Bailey, professor of agricultural biochem istry in the University of Minnesota, is one of th e foremost cereal chemists in th e world. H is work, often w ith a band of devoted students and postgraduate workers, is well known to all workers in th a t field. H is con tributions, both in q u an tity an d quality, to cereal chemistry probably exceed those of any other worker. He was awarded th e highest honour th a t can perhaps be given to a cereal chem ist, nam ely, the Osborne Medal of th e American Society of Cereal T 381 Chemists, in 1932. H e has practical experience o f book-writing in th a t he published in 1925 a book entitled “The Chemistry of W heat F lour” , which was No. 26 of th e Monograph Series of the American Chemical Society, of which th e present book is No. 96. Nobody, therefore, is b etter fitted to undertake th e task of collecting together in book form th e known facts on the constituents of wheat an d its products. W ith characteristic painstaking thoroughness, Prof. Bailey has for years been working on a card index system to collect the necessary facts for the present book. The book has a definitely restricted scope. I t does not deal w ith th e processing of w heat and its products, th e chem istry of such processing such as the changes which occur in milling and bleaching, or in the m ak ing of bread or confectionery goods. I t is hinted in th e preface th a t a fu rther book dealing w ith these and allied m atters m ay be issued later. So far as it is possible to make such an a rb itrary division, the present book is concerned w ith exactly w hat the title states, namely, the nature of th e various con stituents, such as the proteins in w heat and its pro ducts, th e character of the starch, sugars, gums, lipids, minerals, pigments, etc., present, and particu larly the vitam ins which are now known to exist in th e various portions of the grain. The vitam in chapter is typical of the whole book in th a t it gives a comprehensive account of practically all the im p o rta n t work which has been done, especially the recent work. W hat will be particularly appreciated is th e fact th a t this chapter covers not only Bj and its distribution in the grain, b u t also all the known facts w ith respect to the presence of riboflavin, nicotinic acid, pyridoxine, pantothenic acid and other vitam ins in the whole grain, in various types of flour and in offal, including germ. The book comprises sixteen chapters. Practically th e first half, namely, up to p. 139, is concerned w ith the protein and other nitrogenous constituents. This p a rt is particularly full, b u t contains much of th e earlier work, now known to be of little value b u t which is presum ably retained as of historical interest and to give th e background for th e more recent work. The book is not intended as a te x t book for the various industries concerned. There is little general discussion and it consists essentially o f a record of published scientific investigations. I t will therefore be of particular value to future research workers. The book is well balanced and there are relatively few omissions to work th a t m atters. The comprehensiveness of the book, although only of 332 pages, is seen from the fact th a t there are approxim ately eight hundred names in the authors’ index, and the references to published papers approach 2,000. The book appears to be singularly free from errors and m isprints, although it was the observed th a t in Table 112 the last column should presum ably have been mgm. per 100 gm. and not mgm. per lb. Incidentally, the variety of ways in which vitam in results are recorded, such as ygm.jgin., mgm./100 gm., mgm ./lb., etc., are always confusing, an d it is convenient to have th e relationship table given on p. 282 of the book. The book not only' fulfils a real w ant b u t also fulfils th a t w ant well. There is a scarcity of good books on the chem istry of w heat and its products, an d this is true of any language. We have no hesita tion in recommending th is book to all advanced workers in this field-—in fact, they cannot afford to be w ithout it. D . W. K e n t -J o n e s . 382 N A T U R E Endocrine Man A Study in th e Surgery of Sex. B y D r. L. R . Broster. Pp. x i+ I4 4 . (London: W illiam H einemann (Medical Books), L td., 1944.) 12s. 6d. net. T is impossible to review this book in th e space available. I t is full of ideas, records of experi m ental work and stim ulating discussion. E very page of it counts. The author is a surgeon a t th e Charing Cross Hospital, and his broad thesis is a discussion of the origin and evolution of w hat he calls the instinctive tripod, namely, self-preservation, growth and sex, all of which are classified as instincts. The chapter leading to his discussion of instinct is a rem arkable summing up of th e development of animals. Like th e final chapter on th e n ature of m an, it reveals th e au th o r’s wide knowledge and outlook. The chapters on th e evolution of species, on th e physiology of th e autonomic nervous system and on th e functional evolution of th e endocrine system are no less valuable. The last-nam ed chapter introduces the auth o r’s stu d y of virilism , feminism, in ter sexuality and other more obscure conditions due to disorders of th e adrenal, th e p itu ita ry and th e genital glands, which he has been conducting w ith his collab orators a t the Charing Cross H ospital for th e last fifteen years. The book reveals some of th e rem ark able results which have been achieved by th e surgical treatm ent of these disorders and discusses their biological significance. The quality and trend of this discussion m ay be gathered from th e au th o r’s suggestion, based upon his experience and clinical observation, th a t, w hatever th e genetic (chromosomal) constitution m ay be, th is m ay be overridden by hormonal influences. In his last chapter th e au th o r suggests th a t slight adaptations resulting from nervous and endocrine control (he has already discussed th e interplay be tween hormones and th e functions of th e brain) could be “inscribed in th e fram ework of th e germ cells” . This view visualizes th e v ital role of th e endocrine system in th e integration of development and also suggests th a t “variable factors m ay be introduced into the germ plasm through its hormones to account for influences which, on th e whole, have consistently led to the progress of m ankind” . Sir P eter Chalmers Mitchell contributes an interesting foreword and there is a valuable bibliography. Everyone will hope th a t th e work of th is team , interrupted b y surgical w ar service, will be resumed as soon as possible. G. L a p a g e . I S e p t e m b e r 23, 1944, v o l. 154 if biological cure cannot be attained, clinical cure is possible in nearly every case of early syphilis if the patient will co-operate, and this is all th a t it is necessary to say. A more hopeful note could have been sounded on the length of treatm ent for syphilis in these days when intensive treatm ent is widely used and penicillin is ju st over the horizon. Sheffield Burns B y D r. W. H . Hatfield. Pp. 213. (Sheffield : J . W. Northend, L td., 1943.) 7s. 6d. H O RTLY before his unexpected death, Dr. Hatfield, whose name is closely associated with the development of special steels, had completed some reflexions on people and things, inspired by the sight of the great conflagration in Sheffield during the air raids of 1940. D r. Hątfield was a devoted son of Sheffield, and his aim in w riting was to help in its restoration. The little book contains reminiscences of the a u th o r’s contacts w ith scientific men and other notable people a t home and abroad, brief accounts of visits to industrial centres in other countries, and expressions of personal opinion on m atters of public interest. H is views on economic questions, based on experience in large-scale industry, lean strongly to th e side of private enterprise, while his remarks on scientific and industrial research and its organization gain weight from his own m arked success in stim u lating co-operative research in th e iron and steel industry, and from his earnest advocacy of a similar policy for industry in general. Any profits from the sale of the little book are to be devoted to St. D unstan’s. S The Statesman’s Year Book Statistical and H istorical Annual of the States of the W orld for the Y ear 1944. E dited by D r. M. Epstein. Eighty-first annual publication, revised after Official R eturns. Pp. xxxvii + 1484. (London : Macmillan and Co., Ltd., 1944.) 30s. net. N spite of current difficulties, the new issue of this valuable reference volume m aintains its scope and size. Revision of statistics has been difficult and for m any States impossible, b u t the latest available are given. F or m any p arts of the B ritish Commonwealth and the U nited States figures are of a recent year. The section on the armed forces o f the U nited States has been extended. Other additions include a short account of the B ritish Council and its aims, the Middle E ast Supply Centre, and, under Australia, an account of the A ustralian Capital Territory. The Human Reproduction and Venereal Disease introductory tables of comparative production of B y D r. Jo h n Drew. Pp. 124. (London : Faber and various commodities have had to be omitted, but Faber, L td., 1944.) 3s. 6d. net. there is still a section on the League of Nations. A H IS laym an’s guide to th e venereal diseases is coloured m ap shows the extent and boundaries of wider in scope th a n th e title suggests. I t covers Poland a t various periods in the history of th a t State. The useful book-lists for each State have been fully hum an anatom y, th e venereal diseases and their treatm ent, th eir relation to sterility and th eir socio revised. logical implications. The descriptions o f diseases are accurate, b u t as th e author has gone to so m uch Brompton Hospital Reports trouble to give th e medical term s for th e lesions he A Collection of Papers recently published from the describes it Would have been wiser to avoid all H ospital. Vol. 12, 1943. Pp. vii+ 163. (London: possibility of m isinterpretation in th e case of Brom pton H ospital, 1944.) 8s. net. H E papers in this volume are reprints of recent “condylom ata” and have called them “condylom ata work by members of the Brompton Hospital la ta ” . Many people have condylom ata b u t only staff. Most are concerned with diseases of the ches some are also syphilitic. Some purists m ight quibble a t the guides to pronunciation given for treponem a In an interesting statistical survey on “The H ealth o f th e D octor” , D r. A. Hope Gosse challenges the (treppon-nee-mar) and gum m a (gum-mar). A book for laym en is scarcely th e place to indulge title of ‘the doctor’s disease’ often given to corona ry in discussions about criteria of cure in syphilis. Even thrombosis. I T T n o . 3908 , S e p t e m b e r 23, 1944 N A T U R E 383 la tte r egg-shaped, w ith the small end pointing southsouth-east ; (2) if th e hollows were m eteorite scars, th ey would alm ost certainly have to be attrib u ted to m eteorite explosions; b u t an explosion is necessarily By D r . E. B. BAILEY, F.R.S. quasi-instantaneous and therefore has a strong ten dency to give a circular, not an elongated crater ; Geological Survey of Great Britain (3) anyhow, the rim s consist of clean, washed sand, OUGLAS JOHNSON’S recent death is mourned in contrast w ith the loamy sand of the plain upon by a wide circle of friends and adm irers on both which they rest-—they cannot be interpreted as made sides of th e A tlantic. Johnson delighted in inter of plain sand throw n out by explosion ; (4) no frag pretation of scenery and showed to equal advantage m ents of m eteorites have been found in much the in choice of subject, plan of a tta c k and clarity of greater p a rt of the region—though we m ust remember exposition. In his latest m onograph1, which includes th a t no fragments of the great Siberian m eteorite forty-six illustrations, m ostly air-photographs, he have been recovered and also th a t iron is soluble ; dealt with a problem atical erosion form represented by (5) magnetom eter search for buried meteorites has tens of thousands of parallel, oval, m arshy hollows given unpromising results. pitting th e coastal plain of America. The area affected Cooke and Johnson, in attacking the m eteorite measures some 25,000 square miles, and ranges hypothesis, agreed th a t eveiy oval hollow held a lake through South Carolina into neighbouring States. during some form ative stage of its career, and th a t Here marshes of any shape are commonly called the associated sand rim is in a sense a beach coupled ‘bays’, perhaps, it has been suggested, because bay w ith dunes. The rims are conspicuous in air photo trees flourish in them . This local practice accounts graphs, because they carry very little vegetation. On for the title selected by Johnson for his book, “The the other hand, th ey seldom rise more th an 10 ft. Origin of th e Carolina Bays” . Johnson alternatively above th e plain, though occasionally spreading o u t speaks of th e oval hollows as craters. They are shallow wards for several hundred feet across it. They are basins, measuring anything from a few hundred feet not infrequently m ultiple. So far, I th in k th a t Cooke up to four miles in length, and averaging about 50 ft. and Johnson are c o rre c t; b ut, when they go on to in depth, when allowance is made for p artial infilling claim wind-operated w ater as a main shaping agent with peaty silt. Usually they are more or less com of the ovals, I think they are mistaken. A t first both pletely encompassed w ith w hite sandy rims. authors invoked a longitudinal wind to account for The parallel oval hollows are p atch ily distributed th e elongation and parallelism of the ovals ; b u t over a terraced plain which, eighty miles inland, rises eventually they abandoned this particular conception. to a maxim um elevation of 300 ft. above sea-level. Here in outline are th eir subsequent strongly diver According to C. W. Cooke’s account, th e surface gent views. consists of a veneer of Pleistocene m arine sands, Cooke thinks th a t a steady wind blowing across sandy loams and clays, often less thanfSO ft. thick. any lake w ith yielding shores tends to set up a These rest unconformably upon various T ertiary and rotating current, and th a t this current would assume Upper Cretaceous formations, which effectively con a circular p a th if only the earth were standing still. ceal a depressed floor of ancient crystallines. The Under existing conditions of earth rotation, he claims oldest of th e Cretaceous formations, the Tuscaloosa, th a t the current tends to become elliptical w ith its is still in th e condition of sand w ith interstratified m ajor axis directed north-west in the northern clay. Along w ith several of th e later formations, it hemisphere. H e further considers th a t the ideal carries abundant water, sometimes under artesian resultant ellipse would have an axial ratio equal to head. True artesian, overflowing wells are a common the sine of the la titu d e ; and he quotes a num ber of Carolina ovals conforming w ith this quantitative plan. place throughout th e region. The peculiar oval form characteristic of so m any I confess th a t a fter reading w hat Johnson has to say of the Carolina hollows was first brought to the on this subject, and Cooke’s own recent reply2,1 think notice of scientific men in 1895 by L. C. Glenn. He th e la tte r’s argum ent is faulty. regarded it as produced under coastal or sea-bottom Johnson devoted the last seven chapters of his book conditions ; b u t I thin k we m ust follow Johnson in to w hat he called his “hypothesis of complex origin” . attributing the ovals definitely to th e post-emersion In it, wind-driven currents and waves are given much history of th e plain. Glenn’s descriptions attracted less importance th an in his previous hypothesis. In little attention until reinforced by aerial photographs, fact he was prepared to hand over the making of the taken for forestry and other purposes. Then in 1933 hollows, their elongation, parallelism and the rough came a dram atic paper by F. A. Melton and W. shaping of their oval form to springs controlled by Schriever, claiming th e oval hollows as scars of a underground conditions. The only essential service prodigious shower of meteorites. The m ain basis of he asked of the wind was to smoothe the shores of this hypothesis was th e amazing tendency to th e ovals by removing headlands and embanking parallelism exhibited by th e ovals of any particular bays, w ith concurrent development of sandy rims. Even so, I think it possible to dem onstrate th a t he district. Melton and Schriever’s appeal to heaven m et w ith trusted too much to the wind and too little to the a mixed reception. Cooke and Johnson were early springs. I think th a t Johnson paid too little attention to the opponents. In the volume under review, Johnson devotes four chapters to its criticism, from which I phenomena of intersecting ovals as illustrated, for select a few points which seem to ju stify his un b elief: example, in the figure here reproduced. Surely one is (1) the parallelism of th e ovals is not regional, for bound to ask how, on Johnson’s hypothesis, was the near the border of N orth and South Carolina the wind persuaded to leave intact cuspate headlands a t general orientation is south-east, whereas near th a t the points of intersection of two contiguous ovals ; of South Carolina and Georgia it is south-south-east— and how was it educated to connect such headlands here in passing it m ay be rem arked th a t in th e former w ith a bar of drifted sand, which, continuing faith locality th e ovals are m ostly elliptical, and in the fully the curvature of the shore of one oval, utterly METEORITES OR SPRINGS AS GEOLOGICAL AGENTS? D 384 N A T U R E disregarded th e contour o f th e other. Clearly the form ation of oval basin and oval rim was an operation one and indivisible. The rim sand can be called a beach if so desired, b u t it was thrown out, not drifted along. In this im portant m atter, Melton and Schriever seem to me to have come nearer th e tru th th an Johnson. I do n o t m ean to say th a t th e phenomena o f intersecting ovals rehabilitate th e m eteorite hypo thesis, b u t I do think th a t they entail a more violent use of Johnson’s springs th a n their au th o r thought necessary or a t a 11 desirable. Before leaving th e subject of wind, I m ay say th a t Johnson has convinced me th a t wind has often co operated in im portant m atters of detail. I refer especially to a frequent slight exaggeration of the curvature of th e ovals on th e ir eastern sides and a corresponding m arked accentuation o f rim develop m ent in th e same direction. I t looks to me as if, Septem ber 23, 1 9 4 4 , v o l . 154 ally collected together to form a rim—here it may be noticed th a t the rim sand outside any Carolina hollow is always o f much less volume th an the hollow itself. Johnson also considered th a t a circular pool thus formed would expand considerably through slumping of th e loamy sand forming its banks. Finally, returning to his hypothetical migrating springs, he argued th a t a t the surface they would act in all particulars like stationary springs, except th a t th ey would give elliptical instead of circular pools. I consider th a t we m ust modify Johnson’s spring hypothesis in certain particulars before we can adopt it. There are two m ain reasons : (1) it is extremely doubtful w hether artesian springs show any marked tendency to m igrate up-dip ; (2) Johnson derives his oval hollows through intersection of successive cir cular hollows. Let us examine this last point. We have seen th a t intersection of oval hollows is char- INDEX MOSAIC OF AERIAL PHOTOGRAPHS COVERING PART OP BLADEN CO., NORTH CAROLINA. NOTE ELLIPTICAL FORM AND SOUTH-EAST TREND OF THE DARK MARSHES KNOWN AS ‘BAYS’. NORTH IS AT TOP. THE LARGE ‘BAY’ SOUTH-EAST OF CENTRE IS THREE MILES IN LENGTH. FROM FIG. 2 9 OF “ THE ORIGIN OF THE CAROLINA BAYS” . when the hollows were formed by spring action, a westerly wind was usually blowing. Let us now tu rn to consider Johnson’s spring hypothesis. One of his main ideas is th e eruption of an artesian spring through impermeable cover. This would result underground in a w ater-rise, th e inverse of a w a te rfa ll; and Johnson thou g h t th a t a waterrise m ust have a strong tendency to m igrate up-dip through backw ard erosion of th e impermeable obstacle th a t it has breached. Accordingly, he held th a t artesian springs a t th e surface in any particular locality will m igrate parallel w ith one another in a direction contrary to th a t of th e dip o f th e under ground stra ta . Continuing, he pointed out th a t a stationary spring m ay be expected to develop a circular pool, if it emerges through a superficial deposit o f loam y sand, because of rem oval o f con tinually agitated m aterial, in solution if soluble, or in suspension if of a clayey nature. Such a process would leave a residue of quartzose sand to be eventu- acterized by cuspate headlands often connected^ by a well-developed rim . Intersection of circular hollows should be sim ilarly advertised if it had really taken place. Personally I accept Johnson’s conception of spring action w ith linear application determ ined by some structure in an impermeable layer through which the w ater has risen ; b u t I th ink th a t appearances prove th a t the spring of our hypothesis made a simultaneous a tta c k all along the line, instead of starting a t one end and gradually m igrating to the other. Thi.s clearly indicates guidance by joints in the im per meable layer rath e r th a n by dip. Dip can, however, probably be retained as a factor of local importance. In some districts, as already stated, the ovals are egg-shaped. This would be expected if the top of the impermeable, jointed layer has a fairly pronounced dip in the direction of an opened joint th a t gave passage to rising water. I t is clear th a t the water, issuing nearer the surface a t one end of the joint than n o . 3908 , Septem ber 23, 1944 N A T U R E at the other, would produce an asym m etrical result. I imagine th e pool would narrow in th e direction of dip. I t will be noticed th a t I have proposed a drastic reduction in Johnson’s tim e-table. This involves a greatly increased call upon w ater supply, m easured in gallons per hour. A little fu rth e r tho u g h t shows, however, th a t th e supply was m aintained only for a very short period. The w ater which made a hollow w ith rim complete cannot have continued to flow on anything like th e same scale a fte r it had done this work. Otherwise it would have cut an escape channel of dimensions comparable w ith those o f th e spring pool. Many of th e depressions do have escape chan nels, b u t these are on a scale commensurate with th a t of certain artesian springs which are occasionally to be identified in th e m arshy bottom s. The sudden cessation of th e springs of our modified hypothesis removes them a t once from th e artesian category. Such transient springs m ust depend on load pressure for th eir activation. W hen an e a rth quake shakes an alluvial district it generally leads to discharge of sand and w ater from numberless craterlets. I imagine th e cause m ust be a repacking o f wet sand into patches, some o f compacted sand com paratively waterless, others of loose sand lubricated with w ater and incapable of sustaining load pressure unless furnished w ith outside support. As a result, almost imm ediately a fte r an earthquake has occurred in a suitable locality, sandy w ater spurts up a few feet into th e a ir from craterlets and fissures, and .soon ceases to flow, seldom persisting for more th an a few hours. I am inclined to thin k th a t some such subterranean re-arrangem ent of sand and w ater was responsible for delivery of w ater a t th e surface during the formation of th e Carolina hollows. I t would account among other things for th e frequency w ith which activity shifted from one site to another. An area of underground sand, once repacked w ith e x tru sion of water, would likely rem ain stable in later recurrences of stress. There are striking resemblances connecting the Carolina region w ith fam iliar fields o f earthquake hydro-eruption, such as those of th e Mississippi (New Madrid), 1811-12, Assam, 1897, and Bihar-Nepal, 1934. There are equally striking contrasts. I hesitate to suggest th a t the Carolina hollows are earthquake craters, but- I do hold th a t th e idea is worth serious consideration. Among resemblances is the vast area over which sanding from numberless craterlets m ay occur after an earthquake. J . A. Dunn, J . B. Auden and A. M. N. Ghosh have found this effect scattered throughout 18,000 square miles in connexion w ith the Bihar-Nepal earthquake3. The differences concern in p a rt the relatively small size of known earthquake craterlets. An elliptical blow-hole a t Muzaffarpur, measuring 25 ft. by 10 ft., is quoted as a large example (loc. cit., p. 35). The craterlets seem to make up in num ber for w hat they lack in m easure m ent. “In places th e surface was riddled w ith sand vents, sometimes so completely th a t small areas up to an acre or so in extent, m ight be compared w ith boiling porridge. . . . The universality of th e sand in some places, and th e closeness of the vents, suggest no great depth for its origin, since th e greater the depth of the channels leading up to the vents the more localised and separated would they probably be” (loc. cit., pp. 34, 36). Perhaps a more serious difficulty presents itself in regard to regional, as opposed to local, parallelism. E arthquake craterlets are often strung along fissures 385 (furnishing possible composite homologues with individual Carolina ovals), and earthquake fissures m ay themselves be opened up into craters. This introduces a pronounced element of local parallelism, for earthquake fissures tend to be parallel w ith their contemporaries and predecessors in any small district. Recurrence of parallel Assuring is well illustrated in Charles Lyell’s account o f how the inhabitants of the New M adrid area, which shook again and again during a period of several m onths in, 1811—12, felled trees a t right angles to the fissure direction to serve as bridge-refuges for use should later trem ors give warning of approaching trouble. On th e'o th er hand, m any earthquake fissures are orientated, on a strictly local basis parallel to topographical features, w hether negative as in the case o f th e banks o f a river or pond, or positive as in the case of a road em bank m ent or heavy building. In the Bihar-Nepal ea rth quake, fissures on flat country “rarely showed any constancy in direction ; more generally they occurred as an irregular netw ork” (loc. cit., p. 32). M. L. Fuller,, however, found m atters otherwise in the New Madrid. a re a 4. H e recognized, indeed, th a t m any fissures had been controlled by topography, b u t added : “the second class, or the simple fissures of the sandblow areas seem to have a tendency tow ard a definite arrangem ent, along northeast-southwest lines (aver aging N. 30° E .), although where the blows are scattered the arrangem ent is not always very apparent. The fissures of the sand sloughs are in general parallel to the depressions and are even more commonly aligned in northeast-southw est directions” . One m ust remember also a suggestion m ade long ago, and never so far as I know refuted, th a t much of the parallel jointing of rocks in general is an earthquake phenomenon. I t is to be hoped th a t the next great ejective earthquake will be followed by a careful air survey. 1 " T h e Origin o f th e C arolina B ays.” B y Prof. D ouglas Johnson. (Columbia G eom orphic S tudies, No. 4.) P p . xii + 342. (New Y ork : C olum bia U n iv e rsity P r e s s ; L o n d o n : O xfcrd U niversity P ress, 1942.) 30s. n e t. 8 Cooke, C. W ., J . Geol., 51, 419 (1943). * D unn, J . A ., A uden, J . B ., an d Ghosh, A . M. N ., M em . Geol. S u n . In d ia , 33 (1939). * F u ller, M. L ., Bull. V .S . Oeol. Surv., No. 494, 49 (1912). PAVLOV’S WORK ON HIGHER NERVOUS ACTIVITY AND ITS DEVELOPMENT IN THE U.S.S.R. By FREDA M. THOMAS London School of Medicine for W om en N EW S has recently been received from the U.S.S.R. of the work o f Prof. Maria Petrova, who has been awarded the Order of the R ed Banner of Labour by the Soviet Government for her work on problems connected with higher nervous activity*. Since she joined Pavlov’s laboratory a t the In stitu te of Experim ental Medicine in Leningrad in 1910, she has carried out countless experiments in this field and even refused to interrupt her experiments during the recent siege. Prof. Petrova is typical of the m ajority of Pavlov’s pupils, who, after his death in 1936 a t the age of eighty-six, determined to carry on his work, and in the words of Prof. Frolov “to occupy * All th e re c e n t inform ation in th is a rtic le lias been obtained from cables s e n t b y th e A cadem y o f Sciences o f th e U .S .S.It. F o r th e use o f th is m a te ria l I am g re a tly in d e b te d to Sir J o h n B ussell, o f th e A nglo-Soviet Scientific Collaboration C om m ittee o f th e B ritish Council, a n d th e M inistry o f Inform ation. 386 N A T U R E themselves w ith organizing new experim ents so th a t by their collective labour th e breach in th eir ranks m ight be m ade good”1. Before proceeding to th e su b ject-m atter of th e cables concerning Prof. P etro v a’s work, it would seem fitting to give some account of th e magnificent work of h er m aster, Pavlov, th e fundam ental value of which, as was pointed out in one of his obituary notices8, is shown by th e fact th a t so m uch of it is now regarded as common knowledge. Pavlov graduated from th e M ilitary Medical Academy in St. Petersburg in 1879 and worked as assistant to Tsion, th e discoverer of th e depressor ner «7e, until in 1884 he went to Leipzig to work under Ludwig, from whom he probably acquired some of his precision in observation. H e then worked under Heidenhain a t Breslau, absorbing some of his enthusiasm for science, an d developed th e technique o f perm anent fistulae an d isolation of p a rts of the gastro-intestinal tra c t. H e returned to St. P eters burg in 1886 and was soon p u t in charge of B otkin’s experim ental laboratory, where he showed his talent for the organization of research. In 1890 he was made professor of pharm acology in th e M ilitary Medical Academy an d five years la te r succeeded to the chair in physiology. Throughout his work, Pavlov took pains to have conditions as norm al as possible : for example, when working on th e circulation, he endeavoured to accustom th e dog to th e insertion of a cannula, and in the construction o f th e ‘Pavlov pouch’, p a rt of the stomach was isolated w ith negligible interference with the nerve supply. H e emphasized th e im portance of surgery in experim ental research, and of having healthy, well-cared-for anim als, which he treated as hum an patients w ith regard to anfesthesia, asepsis, narcosis and care a fte r operation. I t was probably as a result of his work th a t scepticism arose as to the applicability to medical practice of results obtained from narcotized or decapitated animals. In 1891 he organized th e surgical departm ent of th e physiology 1iboratory in th e new In stitu te of Experim ental Medicine, the first o f its kind in th e world, founded and financed by th e Prince of Oldenburg, and it was here th a t he carried out m ost of his work on digestion, for which he received th e Nobel Prize for Physiology and Medicine for 1904 s. As Anrep pointed out in an obituary notice4, m ost of tho facts relating to diges tion as it is now known either had th eir origin, or were established, in Pavlov’s laboratory. By 1906, Pavlov h ad transferred his investigations to the brain, b u t he used sim ilar methods, still striving tow ards norm ality, carefully isolating his variables and keeping all other conditions constant. H e focused his atte n tio n on th e correlation between external phenomena and th e reactions of th e organism as a whole, and he followed the lead of Claude B ernard in regarding th e anim al body as an unstable system which constantly m aintains its equilibrium w ith its env iro n m en t; an d for th e m aintenance of this equilibrium he was struck by th e importance of conditioned reflexes. As a result of his investigations into th e so-called psychic flow of some of the digestive juices, Pavlov had become convinced of th e fu tility o f subjective methods o f in q u iry ; he objected to psychologists applying th eir own experiences to th e brain o f the dog and asked : “to understand these phenomena, are we obliged to enter into th e inner sta te of the animal, to fancy his feelings and wishes as based on our own ?” H is sham feeding experim ents h ad shown S e p t e m b e r 23, 1944, v o l. 154 th a t sim ultaneous excitation of organs of sight, hearing, taste or smell influenced the activity of gastric glands, and thus the idea of a complex sub jective sensation was transform ed into w hat he described as “a concrete factor of the physiological laboratory” . B y gradually establishing conditioned reflexes through the simultaneous application of an ‘essential’ and an ‘unessential’ stimulus, Pavlov was able to substitute a more nearly normal animal for the study of behaviour th a n could be obtained by acute experi m ents involving artificial stim ulation of different parts of the b ra in ; and in Pavlov’s life-time their study had m ade m any im portant contributions to an understand ing of th e nature of sleep, neuroses and temperament. The response selected for study was the secretion o f saliva in dogs of which the salivary duct had been brought to the exterior of the cheek so th at the q u antity of saliva secreted in a given tim e could be measured. Pavlov pointed out th a t this choice, although originally accidental, satisfied the funda m ental demand in scientific investigation for begin ning with the simplest case ; it also had the advantage of being easier to assess and less likely to cause complications th a n a m otor response. The ‘essential’ stim ulus was the giving of food, b u t the reflex could be conditioned to an infinite variety of stimuli such as the ticking of a metronome, the flashing of an electric lamp, the appearance of certain figures w ith varying intensities of illumination, a trum pet or telephone, rhythm ic contact of blunt or sharp instrum ents with the skin, or warming and cooling particular p arts of it. By these means, therefore, it was possible to learn much about sense organs and powers of discrimination, such as lim its of audibilily, distinction between metronome speeds, musical intervals and combinations of musical sounds, as well as much about the general and localized functions of the cortex. Pavlov showed th a t association was a simple analysis followed by synthesis, then generalization, and finally an a lo g y ; since a dog could not only differentiate an interval in one p a rt of the musical scale b u t also would respond to all such intervals in other p a rts of the scale. The fact th a t conditioned reflexes were lost if the cortex was removed confirmed earlier findings by Goltz th a t decorticated dogs showed no initiative, would only eat if food was placed in th eir m ouths, and generally lacked the power to ad ap t themselves to changes in their en vironment. Pavlov and his workers increased the knowledge of the m ap of the cortex by establishing certain conditioned reflexes and finding w hether or not they persisted after removal o f different p arts of the cortex, although it was shown th a t in tim e com pensation occurred and some p arts of the cortex could replace others. Pavlov paid great attention to the welfare of his experim ental animals, and minimized all experimenta l errors by mechanical appliances and by isolating his anim als so th a t even the observer and operator were in an adjoining room. H e was a t one time in charge of three laboratories and sometimes had more than sixty people each working on a different problem, b u t he him self remembered th e details of every investigation. H is recognition o f the value of the division o f labour led to th e organization of research team s, of which there are now so m any in the U.S.S.R., the U nited States and Great Britain. Pavlov’s new laboratory a t the In stitu te of Experim ental Medicine in Leningrad was built with No. 3908, S e p t e m b e r 23, 1944 N A T U R E funds from th e Ledenzov Society for th e Advance m ent of Experim ental Sciences and their Application. A t Koltushy, now Pavlovo, a village tw enty miles n orth of Leningrad, th e Soviet Government built for Pavlov an establishm ent which combined labora tories with a rest-home for scientific workers. The buildings bore th e in scrip tio n : “Experim ental Genetics of the H igher Nervous A ctivity” and on th e tower was Pavlov’s w atchword : “ Observation and again Observation” . Each anim al had a separate dwelling-place and there was a hospital, exercising hall and m aternity centre for th e bitches. His two chimpanzees, Rafael and Rose, presented by Prof. Voronov, also h ad their own buildings. E arly in his study of conditioned reflexes, Pavlov showed th a t stim ulation of th e cortex produced excitation. This first spread over a large area and was described as irradiation, and would be followed by concentration, which would be accompanied by inhibition such as occurs where antagonizing muscles are concerned. H e was engaged on this work when Maria Petrova, who h ad ju st graduated from the newly opened W omen’s Medical In stitu te in St. Petersburg, joined his laboratory in 1910. H er thesis for a doctor’s degree in 1912 was entitled “Processes o f Irradiation and Excitation in th e Cortex of the B rain” , and together w ith K rasnogorsky she p er formed m any experiments on excitation and inhibi tion. She also studied sleep, which, as th e result of their experiments, Pavlov was led to regard as generalized inhibition extending to some sub-cortical areas, just as he regarded hypnosis as localized or p irtial inhibition. She later participated in the work on experimental neuroses which were produced by causing interference between th e two opposing p ro cesses, excitation and inhibition, leading to rupture or breakdown of th e cortical mechanism. They studied animals w ith different types of nervous systems ; and by producing experim ental neuroses in dogs, in some of which inhibition predom inated, whereas in others excitation was most pronounced, obtained conditions resembling easily recognizable psychical disorders in man. They made extensive use of caffein and bromides in carefully graded doses in the investigation and subsequent cure of these conditions6.6, and Prof. Petrova recently received the Pavlov prize for her book on th is subject. During the last years of Pavlov’s life, he became increasingly interested in th e applications o f his work to p sy chiatry, and both Krasnogorsky and Petrova devoted much time to these problems. Although Pavlov stressed the im portance of th e objective approach to psychology, he pointed out the help which physiology m ight derive from the stu d y of clinical cases. He therefore made use of psychiatric d ata and visited clinics and talked to th e patients. He m aintained a lively interest in therapeutic measures, and in his last year initiated the treatm ent of schizophrenia by prolonged sleep. Petrova has also continued the work which Pavlov began on the relation between th e endocrine organs and higher nervous activity. F or example, they found it difficult to establish conditioned reflexes in thyroidectomized or senile dogs, and relatively easy to produce experimental neuroses in castrated dogs. Pavlov also showed the influence of the cortex on some endocrine activ ity ; for example, a conditioned reflex was repeatedly reinforced by adm inistration of thyroid e x tr a c t; then, when th e extract was no longer given, an increase in m etabolic ra te was obtained in response to th e secondary stimulus. 387 In a cable from Moscow, Prof. K rikor Kekcheyov records th a t a fte r Pavlov’s death in 1936, Petrova joined Pavlov’s oldest colleague and successor, Leon Orbeli, a t the In stitu te of Physiology of the Academy o f Sciences of the U.S.S.R. H er work there has included a study of the p a rt played by the nervous system in the origin of m alignant tum ours, the production of experim ental neuroses by the use of strong irritants of the nervous system, and in 1943 she established the connexion between the severity of disorders of higher nervous activity and the development o f eczema and various tum ours. A oable from Petrova herself says th a t she has never left Leningrad for an hour since the W ar began as she knew th a t her great m aster Pavlov would not have done so. She gives a vivid description of conditions in th a t city and makes m any bitter comments on the ty ranny of the German invaders. During the siege, which lasted nine hundred days, she refused to leave the city in spite of being re peatedly urged to do so, and she says she found satisfaction in working sixteen hours a day and wrote twelve scientific papers, of which she mentions the following : “Conditioned Reflexes as a Method of Throwing L ight on Mental Traum ata and the Origin of Various New Processes, in particular Cancer”, “Influence of Pear-inducing Factors of M ilitary Operations on Higher Nervous A ctivity in Dogs w ith Differing Types of Nervous System”, “Causes of Old Age and Prophylactic Measures against Prem ature Old Age” . As a specialist in higher nervous activity, she was able to observe the psychology of her fellow citizens and records with pride th a t the harder life became in the besieged city, and the more savage grew the German persecution in the form of hunger and bombardment, the more clearly did she perceive th e people’s firmness, unbending will, ‘comradeliness’ and habit of m utual assistance. The Pavlov In stitu te of Physiology was among the m any im portant buildings damaged by bombs and shells, b u t in spite of these attacks, research was not interrupted, and scientific workers in Leningrad also spared no effort to defend their city. For m onths the daily ration of th e people was 125 gm. o f bread containing only 50 per cent flour. Pavlov considered th a t a certain degree of dis comfort is good for a fertile mind, and th a t a shortage in apparatus and m aterial trains resourcefulness. I t is interesting to compare Prof. Petrova’s description of work under the conditions o f th is W ar w ith an account of one of Pavlov’s assistants of their work during the W ar of 1914 and the Revolution. “I t was often very difficult to get to the laboratory a t all, because, besides other things, there was often shooting and fighting in the streets” ; b u t Pavlov was generally present even if he was the only one, and he severely criticized any late-comer if there was an experiment to be done. H e continued his work in the laboratory on short w inter days by the light of wood torches an d used a kerosene lam p for lectures, in which there was no break either a t the M ilitary Medical Academy or the In stitu te of Physiology. Pavlov was convinced th a t only science could lead th e hum an race to a bright future free from war, revolution and catastrophe, and a t the opening of the fifteenth Physiological Conference in Leningrad in 1935 he said, “W ar is by its n ature a bestial method for solving the difficulties of life, a m ethod unw orthy o f the hum an m ind w ith its immeasurable resources” , and he placed great faith in th e efforts of the Soviet Government w ith Stalin a t its head in its struggle 388 N A T U R E for world peace. In th a t year Cannon rem arked th a t th e outcome of th e efforts, which were being en couraged b y th e Soviet Government, to use Pavlov’s m ethods to condition th e cortex in new ways and thereby to bring about a reform ation of conduct would be watched w ith suprem e interest7. Pavlov himself, in a letter to young scientific workers shortly before his death, said : “I t is a m a tte r of honour for th e youth, as well as for all of us, to ju stify those great hopes which our fatherland places in science” . Pavlov has been accused o f over-simplifying a rem arkably complex subject, b u t his theories have provided useful working hypotheses and th ey have stim ulated effort and increased th e extent of careful experiments by those who agreed as well as those who disagreed w ith his views. H e him self considered theories as w orth while only for finding new lines of a tta c k and accum ulating facts. H e stressed th e im portance of repeated tests to establish th e repro ducibility o f results, an d he shrank from m aking general conclusions. H is work affords a striking example of tru e scientific method, and it is satis factory to learn th a t his colleagues in th e U.S.S.R. have been able to develop it still further in spite of th e difficulties of w ar conditions. 1 F ro lo v , "P a v lo v a n d H is School” (L o n d o n : K eg an P a u l, T ren ch , T ru b n er an d Co., L td ., 1937). * Proc. R oy. Soc. E d in ., 66, 264 (1935-36). * P a v lo v , ‘‘T he W ork o f th e D ig estiv e G lands” , tra n s la te d b y W . H . Thom pson (L o n d o n : C harles Griffin a n d Co., 1902). * A nrep, R oyal S o ciety O b itu a ry N o tices, 2 (1936). * P a v lo v , ‘‘C onditioned R eflexes” (Oxford : U niv. P ress, 1927). * “ L e c tu re s on C onditioned R eflexes” , P av lo v . Vol. 2, tra n s la te d an d e d ite d b y W . H orsley G a n tt (In te rn a tio n a l P u b lish ers, 1941). See also Vol. 1. 7 C annon, W . B ., “ Iv a n P . P a v lo v ” , R et. B ull. Sov. U nion (1935). THE ROYAL NAVAL SCIENTIFIC SERVICE URIN G the W ar of 1 9 1 4 - 1 8 technical progress went ahead, as has again happened in this W ar, a t a vastly increased rate in all the Services. order to compete w ith th e demands for new weapons and counter-measures, th e help of numbers of men of science from th e universities and technical men from private firms was enlisted, and these men were employed in naval establishments all over Great Britain. They were employed very largely on new methods for detecting and destroying enemy sub marines and on developments in radio, new types of mines, methods of mine-sweeping, work on under w ater explosions, torpedoes and navigational devices and the like. The work of these men was of im measurable value to the Navy, and directly after the W ar the A dm iralty decided, as a result of its experiences during th e W ar, to set up a civilian scientific research departm ent under a civilian Director of Scientific Research. The first Director of Scientific Research in the A dm iralty was appointed a t the beginning of 1919. H e was Sir F ran k Smith, who had himself during th e W ar been largely con cerned with th e development of a type of magnetic mine which can be regarded as a forerunner of the German magnetic mine, which was used against Britain during this W ar. The A dm iralty also set up its own research laboratory under the D irector of Scientific Research for th e conduct of th e more D f u n d a m e n ta l t y p e s o f s c ie n tific in v e s tig a tio n . Gradually during th e years of peace the civilian scientific and technical staffs employed in the Naval S e p t e m b e r 23, 1944, v o l. 154 Establishm ents were p u t under the general adminis trativ e control of the Director of Scientific Research, instead of being separately administered as they had been during the W ar. These staffs were embodied in the A dm iralty Scientific, Technical and Chemical Pools, and this arrangem ent ensured a greater measure of uniform ity in the conditions of service in the different establishments, and among people engaged on different types of research and development work, and it also ensured common methods of selection and entry into the scientific, technical and chemical ser vices of the Admiralty. During the years of peace also, the Air M inistry and W ar Office set up civilian scientific research departm ents, which were modelled very largely on the Adm iralty organization. The steps outlined above were steps in the right direction, b u t there is no doubt th a t the Navy, and indeed the other Services, suffered a good deal because the conditions of service of the civilian tech nical staffs were not such as could a ttra c t the best types of men from the universities and other sources upon which the A dm iralty depended. A part from pay and prom otion prospects, the lack of opportunity for publication and loss of outside recognition, as well as rather rigid research programmes, were against the Services in their need for first-rate men. Some of the men of science and engineers who entered the A dm iralty Service in the W ar of 1914-18 are still there, and it is to the work of these men and to those who entered the Service during the years of peace th a t we owe our state of preparedness, such as it was, to m eet the onslaught of Germany. During the present W ar, the perm anent Adm iralty staffs have again been greatly strengthened in numbers and in quality by men of science and engineers drawn again from the universities, research institutions, private firms and other sources. The great advances which have been made in almost every form of technical weapon and in counter-measures are largely due to this body of people, working in the closest daily association w ith industry and outside men of science and engineers, including those of the U nited States In and the Dominions, w ith the naval technical depart ments, and w ith the divisions of the naval staff, who decide in broad outline w hat are the Service needs. The announcement of the formation of the Royal Naval Scientific Service is an indication th a t the Admiralty, having been the first Service department to take the then epoch-making step of setting up a civilian research departm ent within its organization, still recognizes the vital importance of taking yet further steps to ensure th a t scientific research and technical development for the N avy shall not lag behind during the future years of peace. The Adm iralty desires to see the closest co-opera tion between the men of science and the uniformed officers of the Service, and it proposes giving fuller opportunities th an have hitherto been regularly possible for civilians to become thoroughly versed in the ways and the needs of the Service. Further, the civilians will, by virtue of the arrangements which will be m ade for obtaining sea training and experience, come to feel th a t they are more than ever before an integral p art of the Navy. The Fleet Order shows also th a t the Director of Scientific Research, as head of the Royal Naval Scientific Service, will have greater freedom than hitherto in arranging for trans fers of staff between establishments, so th a t the out look of the technical men will become broader and more enlightened th an it is ap t to be if men of science and engineers specialize too long or too early in No. 3908, S e p t e m b e r 23 , 1944 NATURE particular aspects of Naval warfare. The reference to conditions of service including pay and prospects of promotion is vague, b u t it m ust be accepted a t present as an earnest of the good intentions of the Admiralty. The Adm iralty and Government policy towards research in post-war years aims a t giving research and research workers—in th e broadest sense— recognition and status which they have hitherto lacked in Great Britain. I t is also hoped th a t the R.N.S.S. will be accounted an honourable career for men whose leanings are towards science and th e sea ; th a t prospects offered by th e R.N.S.S. will a ttra c t men of the highest calibre to devote their m inds and their lives to solving the great problems which lie ahead of the N avy ; th a t, though th e Government service cannot generally offer m onetary rewards com parable w ith those of the highest walks of industry, yet the other advantages of a N aval technical career will offset the possible financial disadvantage ; th a t the Adm iralty will be enabled to keep after th e W ar some of the brilliant m en who are serving it tem por arily now ; th a t there will be greater freedom for individual research workers to follow up lines of investigation for which they are personally fitted, and th a t the Government will n o t be so m uch in-* clined to look for quick returns. OBITUARIES Sir Arthur Smith Woodward, F.R.S. r t h u r S m i t h W o o d w a b d , lately keeper of the D epartm ent of Geology, B ritish Museum (N atural History), died on September 2 a t the age of eighty. Sir A rthur was a great student of vertebrate palaeontology, th e widest in his work and knowledge of his time. W hen he left Owens College, Manchester, as a very young m an to take a post in th e Museum, he recognized th a t the work of R . H . Traquair on palaeozoic fish had introduced a new standard of investigation and a new outlook, and immediately applied them to the study of later fishes. H e travelled extensively so th a t he saw nearly all th e original materials in the world, and his extraordinary memory enabled him to recall immediately anything which could throw light on the fossils on which he was actually working. Thus his catalogue of th e fossil fishes in the B ritish Museum m arks an epoch in the study of such things. I t was th e first completely general detailed work since Agassiz’s “Poissons Fossiles” and it has had no successor, so th a t it remains the point of departure from which all sub sequent work has proceeded. To him came collections of fossil fish from every p a rt of the world, to be in tu rn described, placed in their position in th e classi fication, and their geological horizon determined. Thus he became known to palaeontologists every where, and was ultim ately a foreign member of some tw enty scientific societies. B ut Sir A rthur’s interests extended far beyond fish. He wrote on fossil Amphibia, reptiles, birds and mammals, doing something of interest in each of those groups, and finally he described the Piltdown man, actually himself finding p a rt of th e m aterial a t Piltdown. His quality was well illustrated by the text-book of vertebrate palaeontology which he published in 1900. This differed in every way from those which S ir A 389 then existed ; it was accurate, it dealt only with forms which were im portant morphologically, it was based entirely on materials which the author had seen, and it was readable. W hen Sir A rthur entered the Museum the col lections of fossil vertebrates, though large, had not been brought together on any considered plan. Under his influence and guidance they were expanded so th a t every im portant fauna in the world was re presented, often by m ost admirable materials. B ut all were bought, sometimes after they had been sought for m any years. Although Smith W oodward himself made a collection of fossil mammals a t Pikermi, and Andrews explored the Fayum , no expedition was ever sent out a t Museum expense ; in consequence, during the p ast th irty years m any foreign museums have exploited fossil faunas which are now inadequately or n o t a t all represented in London. B u t Sm ith W oodward always felt th a t he was a public servant. Everyone, B ritish or foreign, had acoess to all the fossils in his charge, and was allowed to describe anything he wished. Thus the Museum gained because its collections were worked over by men from m any countries, and palaeontology gained because specialists could use its materials, as if they belonged to their own institutions. So Smith W oodward became known and admired b y th e whole body of palaeontologists, occupying a place no one can now fill, and leaving behind a great mass of adm irable work, p a rt of th e foundation of m odern palaeontology. D. M. S. W a t s o n . Prof. S. P. Mercer, O.B.E. the death of Prof. Stephen Pascal Mercer which occurred on A ugust 18 a t the comparatively early age of fifty-three, N orthern Ireland has lost an outstanding figure in the field of agricultural educa tion and one who played a prom inent p a rt in laying a sound foundation for the Faculty of Agriculture of Queen’s University, Belfast. S. P. Mercer (S.P.M., as he was known to so m any of us) was a Staffordshire m an—-the son of Mr. Fred Mercer, the landscape painter—-and was bom a t A bbots Bromley in 1891. His leaning towards the stu dy of agricultural science became apparent a t an early age and is confirmed by his career as a student a t H arper Adams, the Botanisches S taatsinstitut, Ham burg, and the South-Eastern Agricultural Col lege. H e was a graduate in agriculture of the U niversity of London, and held the N ational Diploma in Agriculture. Before coming to N orthern Ireland, Prof. Mercer held appointm ents as lecturer in charge of the D epartm ent of Agricultural B otany at Armstrong College, adviser in agricultural botany for the northern counties of England, and divisional organizer for the N orthern Province under the Food Production D epartm ent of the M inistry of Agricul tu re and Fisheries. During 1919-22 he was assistant director and chief research officer in the Seed Testing Station for England and Wales. I t was while holding this appointm ent th a t he made his survey of seed growing in Great Britain, which is the best known of his earlier work. On his appointm ent, in 1922, as head of the Seed Testing and P lant Disease Division of the Ministry of Agriculture for N orthern Ireland, he threw himself energetically into the organization of the N orthern Ireland Seed Testing Station, where his long experience T heough 390 N A T U R E and intensive knowledge of seeds and seed testing allowed him to build effectively and have left their m ark on this Station as it exists to-day. The study of seeds and allied problems provided his m ain interest on the research side, and his book, “Farm and Garden Seeds” , which is rem arkable for the accuracy and beauty of its hundreds of illustrations of seeds drawn in black and w hite and for th e a ttra c tive style of its writing, portrays him a t his best. His appointm ent as chairm an of th e Research Com m ittee of the International Seed Testing Association established his claim to international reputation. His ability was soon recognized by the rye-grass seedgrowing industry in N orthern Ireland, and his loss will be keenly felt by all those engaged in seed pro duction, who looked to him continually for good advice and wise counsel. As professor of agricultural botany (1924), dean of the Faculty of Agriculture (1928) and senior technical research officer of th e M inistry (1928)—which posts he occupied a t th e tim e of his death—S. P. Mercer will be remembered by colleagues and students alike for his width of vision as a teacher, for th e conscien tiousness of his effort to give sound advice and for his unfailing courtesy. H e became dean of the Faculty within a few years of its form ation, and during his tenure of this office he succeeded in establishing it on sound lines, and gained and retained the respect of all in so doing. His conspicuous services to agri cultural education and research in N orthern Ireland were m arked by the aw ard of the O.B.E. in 1943. A t the outbreak of w ar he undertook additional duties in connexion w ith the control of seed produc tion and distribution in N orthern Ireland, and here he was able to bring his knowledge and experience to bear in assuming his not inconsiderable share of “the war effort” . Mercer did not enjoy robust health ; he worked under a handicap which few of us are asked to bear, and knowledge of this only serves to emphasize the greatness of his achievements. A lover of peace, prevented by indifferent health from fighting to secure th a t peace, artist and idealist as well as m an of science, gentle and retiring of nature, blessed w ith constancy of affection, he would have achieved much more had th e strength been his and had his span of life been longer. We, his colleagues, m ourn the loss of a fine and ardent spirit, an upright and ju st m an rightly disturbed on occasion by the b latan t and consistent imperfections existing in our race and grieved a t his powerlessness to do more to p u t wrongs right. A. E. M u s k e t t . Prof. Leo F. Goodwin record w ith regret th e death of Lieut.-Colonel Leo F rank Goodwin, professor of chemical engineering a t Queen’s University, Kingston, Canada, on August 15, a t the age of sixty-six. H e was the elder son of the late Oscar G uttm ann, author of “The M anu facture of Explosives” and of “M onumenta Pulveris Pyrii” . Prof. Goodwin received his engineering tra in ing a t the City Guilds Central Technical College and then took his Ph.D . in chemistry a t th e U niversity of Heidelberg. He was a member of th e Institution of Chemical Engineers and of the Engineering Institu te of Canada and a fellow of the In stitu te of Chemistry. H e became assistant to Sir William Ram say a t U niversity College and held an assistant professorship for some years a t th e City College, W e S e p t e m b e r 23, 1944, v o l. 154 New York, before taking up his chair a t Queen’s University. There he inaugurated the first compre hensive course in chemical engineering in the British Empire. An enthusiastic advocate of an under graduate curriculum for chemical engineers, he prob ably turned out during the last thirty-five years a larger num ber of fully qualified and successful chemical engineers th an the rest of the British Empire, exclusive of Canada. His published work dealt mainly with large-scale chemical processes such as the m anufacture of pulp for paper, acetone, causticizing and cement colouring, and he was employed as consultant to some of these industries. Prof. Goodwin also had a distinguished m ilitary career, first in the squadron of the Inns of Court Rifles and then in the Princess of Wales Own Rifles, Canada, which he commanded for some years. In September 1914 he came to England with the 1st Canadian Division and served w ith them in France and Flanders during the critical 1915 campaign. After the battle of Givenchy he was seconded for service w ith the Canadian Munitions Board and rendered valuable technical service to the British and Allied Governments. During the present W ar, Prof. Goodwin again served the Canadian Government in a m ilitary and technical capacity, and latterly supervised a number of selected research students engaged on Government sponsored research work. There is little doubt th a t his early demise was hastened by a long period of overwork. Prof. Goodwin leaves a widow well known as an a rtist under the name of Helen Sinclair and a daughter now in the Canadian W.A.A.F. H e will be greatly missed by a wide circle of friends here and in America. R. R obertso n . Dr. M. C. Mott-Smith C. M o t t -S m i t h , w riter in physics for Science Service, W ashington, died on June 9. He was sixty-six years old. A lthough he joined the staff of Science Service less th an three years ago, he had completed since then two im portant fundam ental texts in physics for use in high schools and by soldiers and adult civilians. Of one of these— “Fundam entals of E lectricity”—more th a n 650,000 have been printed, including editions for the use of the American A rm y and a translation into Spanish. Dr. M ott-Sm ith was bom in Haw aii on November 26, 1877. He graduated from the M assachusetts In stitu te of Technology in electrical engineering and obtained his Ph.D . in physics, philosophy and m athe m atics a t the U niversity of Halle, Germany. He was formerly professor o f physics a t Colby College and George W ashington University. D r . M orton e regret to announce the following deaths : Prof. J . C. W. Frazer, research professor of chem istry in Johns Hopkins University, on Ju ly 28, aged sixty-eight. Sir John Jarm ay, K .B .E., a director of Brunner, Mond and Co., Ltd., and of other chemical works, on August 22, aged eighty-seven. Prof. D. E . Smith, emeritus professor of m athe m atics in Teachers College, Columbia University, on Ju ly 29, aged eighty-four. Mr. H. F. Tomalin, formerly conservator of forests, Ceylon, on August 16, aged eighty-two. W no. 3908, S e p t e m b e r NEWS 23 , 1944 N A T U R E and V I E W S University of Bristol : Chair of Chemistry has been announced th a t Dr. Wilson Baker is to succeed Prof. E. L. H irst as Alfred Capper Pass professor of chem istry in the U niversity of Bristol. Dr. Baker studied in th e U niversity of Manchester and, after a period of service in France w ith the Friends’ W ar Victims Relief Organisation, he obtained the degree of B.Sc. w ith first-class honours in chem istry in 1921. He then held successively the Mercer scholarship, the Baeyer fellowship and the Dalton scholarship for research in chemistry, and on taking the Ph.D. in 1924 he was appointed assistant lecturer in Manchester. In 1927 he joined the chemistry staff in the University of Oxford and has also held for some time the position of fellow and praelector in chemistry a t the Queen’s College. H e received the degree of D.Sc. (Manchester) in 1933. Dr. Baker is distinguished as an organic chemist whose work has developed m arkedly our knowledge of various groups of natural products. Special refer ence m ay be made to his contribution to th e chem istry of flavones and iso-flavones and the poly hydroxy benzenes. In addition to work on natural products, Dr. Baker has m ade im portant contribu tions to the theory of chelated compounds of the aromatic series, and has given attention to the study of condensation products of phenols w ith ketones. Along with Mr. T. W. J . Taylor, he undertook a revision of Sidgwick’s “Organic Chemistry of N itro gen”, the new edition of which was published in 1937. Dr. Baker hopes to commence his work in Bristol a t the beginning of Ja n u ary 1945. It Chair of Civil Engineering T h e appointm ent of Dr. A. G. Pugsley to the chair of civil engineering a t the U niversity of Bristol has been announced. As an acknowledged authority on structures, he will be able to m aintain a tradition established by his predecessors, J . F . Baker and A. J. Sutton Pippard. Dr. Pugsley was educated a t Rutlish School, Merton, took his London degree in engineering a t the Battersea Polytechnic, and followed this by an apprenticeship to civil .engineering a t the Royal Arsenal, Woolwich, under Colonel H. Mitchell. He then joined the staff of th e Royal Airship Works, Cardington, and was engaged upon problems of structural design until the establishm ent was broken up by the Government’s decision to discontinue air ship development following th e accidental loss of the R. 101. H e transferred to similar work on heaviertban-air craft a t the Royal A ircraft Establishm ent, Farnborough, and later was appointed head of the Structural and Mechanical Engineering D epartm ent there. During p art of this period he held the appoint ment, by arrangem ent with the Air Ministry, of parttime lecturer on aircraft structures in the post graduate Aeronautics D epartm ent of the Im perial College of Science and Technology, South Kensington, London. He resigned this in 1941 owing to pressure of official duties a t Farnborough. D r. Pugsley’s researches have been m ainly in the field of elasticity in aircraft structures, upon questions of interaction of aerodynamic loading w ith structural elasticities and inertias, and the development of air worthiness design regulations p utting these into practice. H e was awarded the D.Sc. by the U niver 391 sity of London for this work. His activities a t F a rn borough included a notable expansion of th e experimental work on structures, including investiga tion of structural accidents. H e was awarded the O.B.E. early in the present year. Society for Visiting Scientists T h e Society for Visiting Scientists was founded on the initiative of the B ritish Council, and in consulta tion w ith the Royal Society, to provide a meeting place and information centre for men of science from overseas visiting Great Britain. The premises a t 5 Old Burlington Street, W .l, consist of a lounge and meeting rooms, a bar, refectory, and some dorm itory accommodation. These are a t the dis posal of members. The information centre is open to all visiting men of science, so anyone arriving in B ritain can, if he wishes, proceed a t once to the House and be given advice and details of how he can apply for membership. Under the present con ditions it was decided to postpone the official opening for the tim e being ; b u t the Society has been function ing unofficially for the last few m onths and has already been used by a num ber of British and foreign scientific workers, including members of the French Scientific Mission. I t is hoped th a t an official opening will take place in the near future. In the m eantime the Executive Committee has held an informal reception. On this occasion the president, Prof. F. G. Donnan, pointed out the importance of offering hospitality to young scientific workers, and deplored the lack of facilities for them in the past. H e added, “I hope sincerely th a t this modest be ginning will be b u t the nucleus of something much greater and more widely spread, something th a t in the happy days to come will contribute to the friend ship, intercourse, and good fellowship of scientists throughout the world” . Rehabilitation of Liberated Countries T h e rapid advances of the Allies in both eastern and western Europe has brought into prominence the vitally im portant task of carrying relief to the suffering peoples and helping them to restart their agricultural and industrial activities. Several con ferences have recently been held both in Great Britain and in N orth America dealing w ith the m any im p o rtan t problems involved. The work falls into three stages. During the period of m ilitary operations it is in charge of the Civil Affairs Branch of the Army. M ilitary necessities m ust obviously be of over-riding importance, and the closest liaison with the m ilitary authorities is essential. This organization will deal w ith the emergency period, b u t ceases to act when the m ilitary operations have ceased. A t th a t stage a N ational Government will take charge, and it can look to the U nited N ations Relief and Rehabilitation Adm inistration for advice and supplies for completing the relief measures and restarting the agricultural and industrial life of the country. The work of U.N.R.R.A. falls into several sections : supplies of food, clothing, agricultural materials, m achinery and spare parts for restarting damaged factories, especially those concerned w ith food ; and with the returning of the scattered populations to their homes. E xpert committees have collected d ata and worked out bases of allocations and priorities. The combined boards in W ashington will furnish the m ost im portant supplies, and although reserves of food are not yet available owing to m ilitary demands 392 N A T U R E and those of the Civil Affairs Branch, U.N.R.R.A. has already received substantial allocations of other principal items including clothes, seeds and medical stores. In addition, U .N .R.R.A . has established a claim on crops still to be harvested, on clothes to be made, etc. The agricultural and industrial re quirements are closely linked : if, for example, the flour mills could be started, it would be possible to send wheat into the countries assisted; and this would provide n o t only bread for th e people b u t also milling offals th a t would produce m ilk and also anim al m anure to enrich th e soil. Fishing also is to be restarted. The third stage is reached when th e agricultural and industrial life of th e country is beginning to function normally ; a t th a t stage U .N .R.R.A . ceases to operate as its purposes do n o t include reconstruc tion. Organizations have been designed for dealing with the new problems th a t will arise. A perm anent world food and agricultural organization is to be established, and a d raft constitution has already been agreed. Its functions will include th e collection, analysis and dissemination of inform ation about nutrition, food and agriculture. I t will prom ote and recommend national and international action on research and education in these subjects ; also on the conservation of resources, improved m ethods of production, m arketing and distribution, and th e pro vision of adequate agricultural c re d it; it will also furnish technical assistance to Governments when required. No term is set to the operations of this body. A Medical Service in Ethiopia A n opportunity for imm ediate medical service— and especially, it would seem, for service b y trained nurses—is indicated b y an article by D r. R u th Young, form erly principal o f th e L ady Hardinge Medical College for Women, New Delhi, on “Medicine and Nursing in E thiopia” (The Lancet, 797 ; Ju n e 17, 1944). Although it is difficult to assess accurately the incidence of p articu lar diseases in Ethiopia, because no v ital statistics exist, D r. Young has been able to gath er valuable inform ation about th e physique, diet and general h ealth of th e people. The physique of the people living on th e plateau is fairly good, and they are strong an d hardy. The common diseases are typhus, relapsing fever, pneumonia, venereal diseases, dysenteries, trachom a and such parasitic diseases as scabies, tropical ulcer, infesta tions w ith intestinal worms and m alaria. Leprosy is fairly widespread ; b u t tuberculosis is apparently not so serious a problem as it is in other p a rts of Africa, nor do diseases due to deficiencies in diet seem to be common. From w hat D r. Young says there would seem to be as much need of agricultural and veterinary assistance as of medical help. The cows are poor milkers and, although goats are numerous, th ey are kept chiefly for m eat and skins and are not much milked. On the other hand, any increase in production of anim al food products would, it seems, be largely neutralized by th e numerous fasts imposed by the Coptic Church, which, a p a rt from a longer Lent th an ours and other fasts, forbids th e use of foods o f anim al origin on two days o f every week. B utter, m ilk and eggs are included in these for bidden foods. M aternal m ortality is apparently low, and com plications a t childbirth are not common. D r. Young attrib u tes this to th e fact th a t most birth s are norm al and to the very strong prejudice against any kind of S e p t e m b e r 23, 1944, v o l. 154 interference a t childbirth. There is no class of pro fessional midwives sim ilar to th a t which does “such untold damage in a country like In d ia”. Infant m ortality is, on the other hand, probably very high. From questions addressed to women, Dr. Young learned th a t 176 out o f 353 children born alive had died, and she concluded from the evidence available th a t something like 109 of these had died before the age of one year. There is also a high rate of sterility, probably due m ainly to syphilis which, like gon orrhoea, is common. The chief needs a t the moment are, D r. Young thinks, intensive preventive work and the teaching o f m othercraft and hygiene rather th an th e provision of hospital beds. There are at present no properly trained nurses. In an annotation on this interesting article, The Lancet (795 ; June 17, 1944) refers to the hospital to be built in Addis Ababa in memory of the late Princess Tsahai. Most of us will remember the tragic death of this young daughter of the Em peror a t the age o f twenty-two. In G reat B ritain, while she was in exile, she qualified as a State registered nurse after training a t the Great Ormond Street H ospital for Sick Children, London, and later she took fu rth er training a t Guy’s Hospital. R eturning home, she m arried the governor o f a province in Ethiopia and began to organize the health service which she wished to see in her own country. Simple Teaching Apparatus In Physics I n his presidential address given to the Essex Science Teachers’ Association, Lord Rayleigh asks, an d discusses, the question “Are Expensive Appli ances Necessary ?” In the physical laboratory a great deal can be learnt about W heatstone’s bridge by meaijs of a wire stretched along a rough board, graduated w ith ink or pencil marks, w ith a piece of m etal held in the hand to make contact w ith it at any point. From ą purely teaching point of view this is as good, if n o t b etter than, a post-office box costing as m any pounds as the other does pence. I t is m uch less likely to muddle the beginner and will in all probability give him more insight into the physics of w hat he is doing. I f the student has rigged it up for himself he will further get a sense of independence and achievement which he never gets by handling the elaborate constructions of the instru m ent maker. I t is not uncommon to find people who regard an optical instrum ent not as an arrangem ent of reflecting and refracting surfaces, b u t as a con struction of lacquered brass. The schoolboy first regards a telescope as a thing which ‘pulls o u t’. All th e essentials of the instrum ent can be b etter appre ciated by sticking lenses w ith ‘Plasticene’ on a strip of wood. Helmholtz told Lord Rayleigh th a t as a boy he made his own telescope out of spectacle lenses and a cardboard tube. In instrum ents made by the instrum ent m aker m any essential p arts are rightly hidden from view by protective devices, and th e young student is deterred from meddling with them for fear of damaging valuable property. Simple Apparatus in Physics Research I n the same address Lord Rayleigh claims th a t beginners in research also should be “graduates in th e school of string and sealing w ax” . Faraday, and Maxwell in such constructions in the Cavendish L aboratory as his model of the thermodynamic sur face, are each quoted as examples. Sir Charles Parsons, the greatest mechanical engineer of his generation, was able to deal w ith formidable problems n o . 3908 , S e p t e m b e r 23 , 1944 N A T U R E 393 of large-scale construction, y et he found paper, seal ing wax, wire and steel knitting needles very adequate m aterials for making a working model of his air turbine. W hen the late Lord Rayleigh had occasion to set up a pair of m irrors for Fresnel’s interference experiment he m ounted them in a few m inutes on two lumps of soft wax. The am ateur m ethod is not only much cheaper b u t also often takes little more time th an the dispatch of an order to th e instrum ent maker. Progress, too, can be m ade while th e m ind is red-hot upon th e project, before delay has cooled enthusiasm. Little sym pathy is shown for th e research worker who puts th e responsibility for designing his apparatus upon a firm of instrum ent makers. Lord R utherford is quoted as saying th a t, if necessary, lie could carry out research a t the N orth Pole. J . C. McConnel, who was compelled for health reasons to winter in Switzerland out of reach of laboratories or facilities of any kind, still m ade im portant observa tions on the crystallization of ice, noting in particular how large were the individual crystals and how they behaved under bending forces when single crystal rods were cu t in various directions. Lord Rayleigh paid a trib u te to the instrum ent m aking industry and its p a rt in practical life and non-pioneering research. m ounted in one piece by suitable clamps and appears to be very robust, and an additional feature is th a t a supply of hot cooling w ater can be diverted to a tan k near a sink and used for washing. Other interesting types of stills are also described in the Bulletin. The New Carnegie Cyclotron A n e w giant cyclotron has recently been p u t into operation a t th e D epartm ent of Terrestrial Magnetism of the Carnegie In stitu tio n of W ashington. The new cyclotron, one of th e two largest in operation in the world (the other being a t Berkeley, California), generates particles of 15,000,000 electron volts energy, perm itting th e m ost precise measurements ever made of th e forces released by atom ic dis integration. The cyclotron itself weighs more than 225 tons, has an overall height of 12 f t . ; it is 30 ft. long and 20 ft. wide. I t took four years to build, a t a to tal cost of 500,000 dollars for th e cyclotron, its appurtenances, and th e special three-story build ing housing the equipment and instrum ent shop. The magnet is made up of four iron castings, th e largest weighing more th an fifty tons. Surrounded by this heavy m agnet is th e accelerating chamber, about sixty inches in diameter, in which atomic particles are produced. The cyclotron is housed ten feet below ground. “ Books: The Warehouse of Knowledge” W i t h reference to the leading article “Books : the Warehouse of Knowledge” , published in Nature of September 9, p. 319, Mr. Stanley Unwin w rite s: “I f the established book publishers had as m uch as 5 per cent of ‘the paper in the country available for printing’ they would be in clover. The to tal of 420,000 which you give merely includes four categories of paper consumers and omits all others such as the printers. A t the beginning of the W ar it was estim ated th a t books called for about 1J per cent of the total. I t is unlikely even to-day th a t the figure exceeds 2 per cent.” We regret our error in stated percentage of paper available, and since it was a considerable over-estimate, Mr. Unwin’s correction adds still further point to our argum ent. I t m ay be possible, however, th a t even Mr. Unwin’s figures need cor rection, so far as books are concerned, for, as The Bookseller of September 14 points o u t : “These usages, however, do not consume all the paper avail able for printing. There is, in addition, an unknown b u t obviously considerable quantity of printing paper employed outside the above categories ; for instance, the paper used in company reports, trade catalogues, and for a large variety of other commercial purposes”. A New Type of Still T h e Bulletin and Laboratory Notes of September 1943, issued by Messrs. Baird and Tatlock, L td., Esher, Surrey, contains a description of an interesting copper and glass still for the preparation of distilled water in the laboratory. The w ater is boiled by an electric immersion heater in a tinned copper boiler, with a water-sealed lid of the same material. The lid carries a central1m etal tube over which is a glass hood communicating by a backward-sloping glass tube to the special water-cooled spiral glass condenser. A horizontal baffle inside the lid under the central steam outlet minimizes the passage of spray into th e hood, which also serves as a trap. More th a n 90 per cent heating efficiency is claimed. The standard model has a 1 -8 kW. m otor and produces 2-7 lit. of distilled w ater per hour, w ith a to tal w ater consumption of 36 lit. The water, in a particular experiment, had a joH of 6 -0-6-2, and conductivity 1-5-2-0 gemmohs, although these figurea will v ary w ith the quality of the ta p water. Oil or gas heating m ay be used in emergency. The whole apparatus is conveniently Institute of Industrial Administration : Awards T h e Institu te of Industrial Adm inistration has awarded the In stitu te travelling scholarship to Mr. A. G. Irvine for his thesis on “The Purposes and Techniques of M arket Research” . This scholarship, of the value of £250, enables the holder to spend three m onths in the U nited States studying American practice in his particular field of management, assisted by the New York office of the donors of the scholarship, Messrs. Stevenson, Jo rd an and Harrison, Ltd. The Wilson Medal of the Institu te has been awarded to Mr. A. W. Goldstaub, for his paper on “Internal A udit in In d u stry ” . The Junior Executive Prize of books to the value of £5 has been won by Dr. W. L. K ent, for his paper on “The Application of Science to In d u stry ”, and Mr. G. K innaird Evens, for his paper on “The F uture of Psychology in In d u stry ” . Announcements T h e title of reader in tim ber technology in the University of London has been conferred on Dr. F. Y. Henderson in respect of the post held by him a t the Im perial College of Science and Technology. M b . F. E. H u g h e s (assistant conservator of forests, Gold Coast) has been appointed senior assistant con servator of forests, Gold Coast. A c c o r d i n g to the August issue of the AngloSwedish Review, the birth-rate figure in Sweden for the first quarter of 1944 of 33,261 was the highest recorded for this period since 1921 ; the figures for the corresponding period in 1943 and 1942 were 30,079 and 26,240 respectively. More children were born in the towns th an in the country, the birth-rate figure for Stockholm being especially high. 394 NATURE LETTERS TO THE EDITORS The Editors do not hold themselves responsible fo r opinions expressed by their correspondents. N o notice is taken of anonymous communications. Phytic Acid and Phytase in Cereals interesting letter of Dr. R . A. McCanoe and Miss E. M. Widdowson in Nature of May 271, in which they point out th e relatively large quantity of phytase in w heat as compared w ith oats, gives me the opportunity of recording some further facts on this im portant practical issue which supplem ent those given in the letter. This is no mere academic question, b u t concerns w hat in the p ast certainly has been, and in m y view possibly still is, th e most prom inent problem of m alnutrition affecting people in Great Britain. Cereals form such a large p a rt of th e national dietary, namely, about 50 per cent, th a t, if they have a nutritional defect, it is certain to be of great consequence to health and development. W hat we m ust aim a t is to get all the advantages of these valuable foods and a t the same tim e to eliminate or prevent any baneful action they m ay have. Now, cereals have such a defect in th a t they are not only poor in calcium content b u t also they can, under some conditions, interfere w ith the availability to the body of calcium of other foods2. This is of special im portance to the child and adolescent, whose needs for calcium to incorporate in the growing bones, the developing teeth and other organs are great. In th e adult anim al also cereals can denude the bones o f their calcium salts under some conditions. Con tra ry to all expectation, cereals such as oatm eal and maize, which contain m ost calcium, are ju st those which can interfere m ost w ith calcium deposition during growth. In 1939 it was found th a t one substance in cereals which plays a large p a rt in this harm ful action is phytic acid3. Any form of treatm ent which reduces th e phytic acid in cereals either by eliminating it or by hydrolysing it will reduce th e rickets-producing o r anticalcifying effect. I t was found th a t m alting o f cereals, and, more especially, germ ination followed by autolysis of the crushed grain, reduce this action ; an d now McCance and Widdowson have emphasized th e importance of th e hydrolysis of phytic acid th a t accompanies the change from flour to bread as the result of the action of the abundant phytase in the flour. They point out th a t oats and oatmeal, on the other hand, contain b u t little phytase to break down th e phytic acid. They suggest th a t the difference in phytase content of w heat and oat3 explains the results described m any years ago of the smaller rachitogenic action of bread as compared w ith o a t m eal2. T h at this explanation is tru e is undoubted, b u t it is only p a rt of the tru th . Oats and w heat are both rich in phytic acid. In m y experience oats are the richer source, b u t th e variation in different samples of both grains is large and for th e purpose of the argum ent we will assume th a t th e am ount is the same in each cereal and of the order of 200 mgm. phytic acid phosphorus in 100 gm. of the grain. Now the husk which is removed in th e preparation of the oatmeal forms about 30 per cent by weight of the grain, and since this husk contains no phytic acid (it does contain a little phytase) th e percentage of phytic acid in th e dehusked grain rises correspond The S e p t e m b e r 23, 1944, v o l. 154 ingly, namely, up to 270 mgm. or more of phytic acid phosphorus per 100 gm. oatmeal. On the other hand, in processing w heat to flour, assuming th a t the wheat-meal flour is of 85 per cent extraction, the 15 per cent removed in the milling is largely made up of the coarser bran, which is very rich both in phytic acid and phytase. Thus 85 per cent extraction wheat-meal flour would contain about 120 mgm. or even less phytic acid phosphorus per 100 gm. flour. Starting, therefore, w ith oats and wheat grain both containing 200 mgm. phytic acid phosphorus per 100 gm. of grain, by the tim e each preparation reaches the cook, there is a great difference between their contents : 270-300 mgm. phytic acid phos phorus in oatmeal and 120 mgm. in national wheatmeal flour ; and this is not the end of the story. In preparing these products for the consumer, the cook again alters their relative phytic acid content. The oatmeal is boiled as porridge, its small phytase content is destroyed and the phytic acid remains a t the same high figure. In the case of wheaten flour, th e m atter is different. The high phytase content gets a chance of destroying phytic acid in the flour during the period when the dough is standing. In this process, however, the flour phytase is not the only phytase present. The added yeast is also rich in this enzyme, and it may, under some conditions, assist the hydrolytic breakdown of phytic acid. W hether it does so assist seems to depend on the m ethod of bread-making adopted. I f the am ount of yeast added is relatively large (2-1 per cent of flour) and the time of standing of the dough short (2 hours), the yeast m ay add largely to the phytic acid destruc tion. If, however, the yeast added is small (0-6 per cent of flour) and the dough rising-time long (6 hours), the yeast phytase m ay be ineffective. The phytase action of both flour and yeast is greatly increased as the p H is lowered towards 4-5, and it is possible th a t th e additive effect of the larger am ount of yeast may be partially or wholly explained by this change in pH. The accompanying results obtained on baking bread with flour a t two levels of phytic acid content illustrate this effect of yeast. TTy d r o t i Y s t s ott P h y t t o A o td i n B r e a d -m a k i n g H igh a n d low y e a s t = 2-1 p e r c e n t a n d 0*6 p e r c e n t respectively. S h o rt a n d long rising tim e = 2 hours an d 6 hours respectively. no. 3908, S e p t e m b e r 23, 1944 N A T U R E Finally, it m ay be asked, w hat are the nutritional implications of this phytic a c id -p h y ta se problem of cereals ? In the norm al high cereal diet, three situations are presented : (1) when it contains much phytic acid, as when oatmeal or maize meal is largely eaten ; (2) when it contains much inositol and phos phoric acid produced by hydrolysis of phytic acid by phytase, together w ith some unhydrolysed phytic acid, for example, when bread m ade from high ex traction flour is eaten ; (3) when it contains b u t little phytic acid or hydrolysed phytic acid, as when bread from low extraction flour or when a cereal such as rice is eaten. Since both inositol and phos phate are essential constituents of th e diet, it is clearly desirable to have good supplies of these in the food, th a t is, conditions (1) and (2) above, but only so long as (a) these substances are available to the body and (6) neither phytic acid nor its product phosphoric acid is allowed to exert its calciumstealing influence. B oth these necessary conditions can be obtained by increasing the calcium in the diet and by m aintaining a sufficiently high vitam in D intake. Man, especially the Scot, instinctively found the answer to this problem in the case of o a t meal by taking milk freely w ith his porridge. T hat is also the raison d'etre for the present practice of adding calcium carbonate to the modern loaf and vitam in D to the margarine, although it is probable th at, in both cases, the present supplements are too small for the optimum calcium - phosphorus nutrition of m any people. E dw ard M ellanby. N utrition Building, National Institu te for Medical Research, (Medical Research Council), Mill Hill, N.W.7. Aug. 25. 1 M cCance, R. A ., a n d W iddow son, E . M ., N a tu re, 153, 650 (1944). 2 M ellanby, E ., Spec. Rep. Ser. M ed. lies. Coun., Lond., N o. 93 (1925). 8 H arrison, D . C., a n d M ellanby, E ., Biochem. J ., 33, 1600 (1939). Catelectrotonic Potentials in the Dorsal Roots of the Spinal Cord T h e preparation has been the isolated oxygenated spinal cord of th e frog. I t is well known1-2 th a t a dorsal root volley gives rise to a prolonged negative potential which is propagated electrotonically from the spinal cord along th a t root and also along other dorsal roots both ipselateral and contralateral. In adjacent ipselateral roots th is dorsal root potential may be as large (10 mV.) as in the root of entry. W ith submaxima] volleys the dorsal root potential rises to a rounded sum m it in about 20 msec, and then decays approxim ately exponentially w ith successive half-times of about 30-60 msec. W ith larger volleys there is usually a prolonged negative ‘tail’ which is attrib u tab le to long-continued activity of the intem uncial neurones of th e spinal cord, and is paralleled by prolonged after-discharge from the motoneurones. In conformity w ith this explanation, the tail is increased in size and duration by rapid repetitive stim ulation and after soaking the cord in strychnine (1 in 200,000). An antidromic volley in th e ventral root fibres also sets up in adjacent dorsal roots a prolonged negative potential which has a longer laten t period and a 395 slower rise to a more flattened sum m it, b u t which decays a t least as rapidly as the dorsal root potential set up by a dorsal root volley (half-times 25-45 msec.). This decay is always exponential, and never shows any prolonged tail. I f the spinal cord is anaesthetized by soaking in nem butal solutions, the rising phases of both types of dorsal root potential are not appreciably altered, b u t the decaying phases of both are greatly p ro longed. Moreover, the abolition of activity in the intem uncial neurones is associated with a removal of th e tail of the dorsal root potential set up by dorsal root volleys (single or repetitive), which con sequently now decays in a strictly exponential fashion, closely resembling the decay of the dorsal root potential set up by the ventral root volleys. The ‘half-tim es’ are lengthened 10-20 times by 1 in 7,000 nem butal, ranging w ith this la tte r dose between 0-4 and 0-7 sec. F u rth e r increase in dosage abolishes th e dorsal root potential set up by ventral root volleys. The exponential tim e course of the decay suggests th a t, as w ith the synaptic potential produced in the motoneurones3, the 'dorsal root potential is produced by the relatively brief action of an actively depolarizing agent, the decaying phase of the dorsal root potential being relatively passive (except for the intem uncial activity) and governed by the electric tim e constant of the membrane being depolarized. This analysis of the dorsal root potential into active and passive phases is supported by the effect of nem butal, which (apart from the removal of any intem uncial activity) can be simply explained as due to a lengthening of the tim e constant of the mem brane. This tim e constant is a product of impedance and capacity, and since the capacity of living mem branes is b u t little altered even during ex trem e changes in the tim e constant4, it seems likely th a t nem butal produces a large (10-20-fold) increase in the electric impedance of the membrane. I t has long been suspected th a t anaesthetics act in this way5.8. However, in the spinal cord this effect appears to be largely restricted to certain m em branes ; for the electric tim e constant of the m oto neurones remains short even under deep nem butal anaesthesia, the half-time for the synaptic potential being about 25 msec, in the frog3. The location of the membranes responsible for the dorsal root potential has been investigated by setting up a maximum volley in a dorsal root a t all phases of a dorsal root potential produced in th a t root by a previous volley in th a t or another dorsal root, or a ventral root. There is an immediate destruction of a large fraction of the dorsal root potential in th a t root (usually 50-90 per cent, b u t with some roots as small as 20 per cent), b u t no effect on the dorsal root potentials in other roots. On the basis of these experiments, it is suggested th a t the dorsal root potential is a catelectrotonic potential set up in the central term inals of the dorsal root fibres by the actively depolarizing action of potentials produced in nerve cells in close proxim ity, particularly in synaptic contact. W ith the dorsal root potentials set up by dorsal root volleys, the tim e course of the actively depolarizing action (deter mined by analysis) is such th a t it could be produced by the synaptic potentials set up in those nerve cells b y the dorsal root volley. This suggestion would explain the extensive distribution up and down the cord of the dorsal root potential produced by a volley in one dorsal root. The decay of the dorsal 396 N A T U R E root potential would be governed by th e tim e con stan t of the mem brane of th e term inal nerve fibres of th a t dorsal root, and it would be these term inals th a t are specifically affected b y nem butal. The p artial destruction o f th e dorsal root potential b y a m aximum volley in th a t root suggests th a t the impulses do not penetrate to all th e central term inal nerve fibres of th a t root. This suggestion recalls th e findings of Renshaw* and Lloyd7 th a t an antidrom ic impulse in a ventral root fibre m ay fail to spread over the surface of th e motoneurone of th a t fibre, block apparently occurring a t th e axon hillock. J o h n C. E c c l e s . Physiology D epartm ent, Medical School, Dunedin, N.Z. Ju n e 27. 1 B arro n , D . H ., a n d M a tth e w s, B . H . C., J . P hysiol., 92, 276 (1938). 1 S o n n e t, V ., a n d B rem er, P ., Compt. Rend. Soc. B io l., 127 , 806 , 812 (1938). •E c cle s, J . C „ N ature, 153, 432 (1944). • Cole, K . S., a n d C u rtis, H . J ., J . Gen. Physiol., 22, 649 (1939). •O s te rh o u t, W . J . V ., " In ju r y , R eco v ery a n d D e a th in re la tio n to C o n d u ctiv ity a n d P e rm e a b ility ” (P h ilad elp h ia, 1922). •R e n s h a w , B ., J . N europhysiol., 5, 235 (1942). ’ L loyd, D . P . C., J . Neurophysiol., 6, 143 (1943). • G u ttm a n , K ., J . Gen. P hysiol., 22, 567 (1939). Se pt e m b e r 23, 1944, v o l . 154 worm defsecated during burrowing, th a t particular experim ent was discarded.. Usually, however, defecation did not occur. Of the successful experi m ents, two were done on th e beach a t Bangor, the worms being allowed to burrow as soon as they were dug up, and the rest in the D epartm ent of Zoology of the U niversity of N orth Wales, using m uddy sand from the beach. Generally there was a very slight loss o f weight during burrowing (see table). The density of th e wet, m uddy sand was about 1-9, so it seems th a t significant am ounts cannot have been swallowed. W eights (gm.) S itu atio n W orm No. Before burrow ing A fte r burrow ing Difference B each 1 2 4-0 7-5 3-8 7*3 -0 -2 —0-2 L ab o rato ry 3 4 5 6 3-8 7-0 8-2 12-3 3-8 6-9 8-1 12-3 0-0 —0*1 —0-1 0-0 (2) Dissection experiments. Five worms were kept in clean sea w ater in the laboratory for from three to four weeks. Three of them were then allowed to burrow into sand from the beach, as described above, then dissected under 8 per cent magnesium chloride, which acts as a narcotic*. The other two were dis sected w ithout prelim inary burrowing. In the two Mechanism of Burrowing in controls, there was no trace of sand in any part of Arenicola marina L. th e gut. In the worms which had burrowed, small am ounts o f sand were found in the oesophagus, but I p a living lugworm is p u t on th e surface of wet there was none in any other p a rt of the gut. One of sand or m ud, it curves its head downwards and th e three had a single, m inute mass of sand, com burrows in. During th e burrowing act (which was prising only some half-dozen sand-grains; the described in detail by J u s t1), th e proboscis is ex second had a single, compact mass, 2-3 c.mm. truded and w ithdraw n, wave-movements o f a ch ar in volume ; and the th ird had most of its oesophagus acteristic kind trav el forwards along th e body, and incompletely filled w ith a cylinder of sand. In all the notopodia are directed backwards. cases, the am ounts ingested were negligibly small, According to m any authorities, th e lugworm compared w ith the volume of a whole worm. swallows sand as it burrows. Thus Stannius8 wrote : Clearly, the idea th a t Arenicola passes through the “Legt m an eine ausgegrabene Arenicola a u f eine von sand like an anim ated cork borer is fallacious. Seewasser etwas bedeckte sandige Stelle des Ufers, Burrowing is achieved by thrusting the sand, or mud, so fangt sie alsbald an, eine Rohre im Sande sich zu aside ; very little, if any, is taken in through the bohren. . . . Die Róhren entstehen aber nicht ausch- m outh. The proboscis is used in burrowing, and also, liesslich dadurch, dass die W iirm er den Sand oder presum ably, in feeding*, so it appears to be capable den Schlamm an die Seite driicken, sie versclilingen of widely different types of action. vielmehr beim Bohren bestandig Sand ; der ganze In conclusion, a note m ay be added about the D arm kanal wird da von angefiillt, und ehe der hinterste rem ark of Stanniusa, quoted above, th a t defecation Theil des Thieres die Oberfiache des Bodens ganz accompanies burrowing. I saw defecation during verliisst, wird der verschluckte Sand durch*den*After burrowing in two of four worms on the beach, and wieder entleert.” A shworth3 concludes a de never in the laboratory. The worms used in the lab scription of burrowing w ith th e words “B y these oratory had been kept in clean w ater for a couple of means, a passage is eaten and forced through the days a t least, and had p a rtly or completely emptied m ud” . th eir intestines. I th ink it likely th a t the defecation W hen those passages were w ritten, th e mode of occurs only in replete worms, as a pressure effect of life of the lugworm was n o t well understood. In some kind incidental to burrowing. Perhaps those particular, burrowing and feeding were supposed to which defecated would shortly have done so in any be one and the same process. More recent work, case, even if they had not been disturbed. however, indicates th a t the two are quite distinct4. G. P. W e l l s . The worm is now believed to excavate an _L-shaped D epartm ent of Zoology, gallery, and to lie w ith its head a t th e blind end, University College, eating the surrounding m ud. I therefore made the London. following experiments, to find out w hether significant Ju ly 23. am ounts of sand or m ud are in fact swallowed during 1 J u s t, B ., Z . vergl. Physiol., 2, 155 (1925). burrowing. (1) Weighing experiments. Lugworms were first 2 S ta n n iu s, H ., M uller’s A rch., 352 (1840). orth, J . H ., “ Arenicola” , L .M .B .C . M em oirs, X I (1904). weighed, then allowed to burrow until only th e tip 34 AT hshw a m d ru p , H . M ., M edd. K om m . Havundersag., K b h ., 10, 2 (1935). of the ta il could still be seen, then dug out and 6 L edingham , I. C., an d W ells, G. P ., N ature, 150, 121 (1942). weighed again. The anus was watched, and, if the • W ells, G. P ., J . E x p . B iol., 14, 117 (1937). n o . 3908 , S e p t e m b e r 23 , 1944 N A T U R E Sewage Bacteria Bed Fauna in its Natural Setting 397 debris forms on th e surface, and when this has thickened and dried it can be rolled off like a carpet, leaving th e filter again porous and receptive to fu rth er dosing. This discovery of the bacteria bed fauna in its n atural setting should help in th e study of its theoretical aspects which hold m uch of interest, especially in regard to anim al com petition^3,4. I t is also of practical interest since th e invasion of dwell ings by sewage flies is often a m atter of concern to sanitary authorities and it is im portant to know from w hat other sources they m ay come. I t has been observed th a t th e bacteria beds of sewage works form an environm ent for insects unlike anything in N ature1. The depth of th e habitable zone is great, so th a t compared w ith m ost insect habitats it is alm ost like th e cube against the square. I t is well aerated and constantly supplied w ith a basic food supply both in solution and in finely divided form evenly spread over th e bed. The tem perature is protected from extremes, on one hand by the heat generated by vital processes and on th e other L l . L loyd. hand by the effects of evaporation. The daily tem P The University, perature swing is restricted. Larvas and pupse are Leeds, 2. Aug. 16. not accessible to birds except a t th e surface. This ‘ D yson, J . E ., an d L loyd, L l., J . Proc. In st. Sewage Purification, insect fauna is characterized by th e small num ber P t. 2, 28 (1933). of successful species and th e great prevalence o f * L loyd, L l., G raham , J . 3?., a n d R eynoldson, T . B ., A n n . A p p . Biol., 27, 122 (1940). those few which do succeed. In eight years of * L loyd, L l., A n n . A p p . B io l., 30, 47 (1943) trapping on th e K nostrop beds a t Leeds, more th a n ‘ L loyd, 11., A n n . A p p . B iol., 30, 358 (1943). h alf a million insects were caught and scrutinized ; and, though in all about a hundred species were taken, 99-7 per cent of th e to ta l belonged to six species of Imperial Forestry Institute, Oxford nematocerous flies, namely, Metriocnemus longitarsus, I n commenting in Nature of Ju ly 15, p. 94 on the M . hirticollis, Spaniotoma minima, S . perennis, Psychoda altemata and P . severini. The enchytraeid 1942-43 report of the Im perial Forestry In stitu te, it worm, Lumbricillus lineatus, has an abundance equal is stated th a t there is difficulty in distinguishing to, or perhaps surpassing, th a t o f an y of these larvae between the respective p a rts played by the Im perial in the K nostrop beds. A t some works, though not Forestry In stitu te and the U niversity D epartm ent a t Leeds, Psychoda cinerea and Anisopus cinctus show or School of Forestry. This is simply explained by a similar prevalence. The collembolan Achorutes th e fact, set out a t length in the 1937-38 report, viaticus and th e cordylurid fly Spathiophora hydro- th a t in 1938 they became a single organization sup myzina are th e only other insects so far recorded as ported jointly by the Colonies, the Forestry Com mission, the University of Oxford and a few smaller prevalent in th e beds. I have recently located th is fauna alm ost intact, contributors. A t the same time, the information though mingled w ith a num ber of other successful branch of the Institu te was taken over by the forms, in th e n atu ral setting o f a m ud flat about Im perial Agricultural Bureaux to constitute a new four miles from th e nearest sewage works. A small, Im perial Forestry Bureau which still works in close slightly contam inated stream passes under a bridge collaboration w ith the Institute. This latte r change and, as an effect of an eddy, forms a m ud flat about resulted in a transfer to the Bureaux of nearly all the th irty yards long and fifteen yards wide w ith a su r original Dominion support for the In stitu te, leaving face usually an inch or two above w ater level. I t is th e Colonial Em pire in a still more predom inant constantly water-logged through seepage, b u t is position among the supporters of the Institute. The amalgam ation of School and Institu te was rarely flooded and then only for b rief periods a fte r heavy rainstorm s, for there is a sill a short distance made prim arily for adm inistrative reasons and to fit downstream giving a rapid recovery to norm al level. in w ith the new arrangem ents for the training of I t is overhung by trees and receives in autum n a officers for the Colonial Forest Service ; it did not thick carpet of leaves which is absorbed into th e m ud affect the research work being done by the staff. in winter and largely disintegrated by summer. This la tte r work continues to be directed towards Samples of th e surface m ud taken to th e laboratory Em pire needs and interests so far as is possible in have yielded 1,500 insects, o f which 44 per cent Great B ritain. In several fields, however, for ex belong to eight o f the ten species enum erated above am ple sylviculture, there is not a great deal having as forming th e insect fauna o f th e bacteria beds, a direct bearing on Em pire forestry th a t can be done Achorutes and Spathiophora only having n o t a p in B ritain. Research in these subjects is accordingly peared in the cultures. Of th e others emerging, directed more towards fundam ental problems and 31 per cent is shared equally between th e blood problems representative of types likely to occur an y sucking genus Culicoides and th e short-palped crane- where, and it has to be carried out in the woods flies, Limoniinss, both o f which have very rarely and forests accessible from Oxford. Such studies are appeared in collections from th e bacteria beds. The clearly likely to be more productive and useful if characteristic enchytraeid worm of th e sewage bed, undertaken in co-operation with the related research L . lineatus, also occurs in th e m ud flat, b u t in num activities of the Forestry Commission. From the educational point of view, it is essential, bers is almost m asked by a swarming tubificid worm for keeping the teaching live and practical, th a t the densely clustered ju st below th e surface. Thus it appears th a t th e m acrofauna of th e bacteria staff should be in the closest possible touch with bed is derived from th a t o f th e organic m ud flat, current practice and developments where the teach b u t the two types of environm ent are not much ing is done. Moreover, the Forestry Commission alike. The m ud flat, however, does ra th e r resemble looks to Oxford, as having the only University Forestry the sand sewage filter. In th is a bed of porous sand School in England, to play its p a rt and undertake some four feet deep is flooded a t frequent intervals its share in forestry education for service a t home with settled sewage which seeps through an d is as well as abroad, and in forestry research of a purified in passage. A m at of cellulose and other fundam ental nature. I t was for these reasons th a t N A T U R E 398 it was felt desirable to aw ait th e publication of the Forestry Commission’s plans before deciding on some aspects of th e future teaching and research organiza tion a t the Institute. I f th e stress in th e report appears to be on th e importance of closer co-operation in research w ith th e Forestry Commission, th is was only because there appeared to be room for it, whereas decisions affecting Colonial forestry h ad already been agreed. The expected W hite P aper has since been p u b lish ed ; it was considered by th e U niversity Committee for Forestry, which found th a t no further changes in its own plans were necessitated. This opportunity m ay be taken to add th a t forestry has recently been m ade an H onour School in th is University, as from th e next academic year ; two years study of biological and physical science will norm ally be required before th e tw o years forestry courses are undertaken, as was already th e position under the sta tu te of 1938. H . G. C h a m p i o n . Im perial Forestry Institute, Oxford. Aug. 21. Structure of Cellulose ' I n their criticism o f m y suggested structure of cellulose1, A stbury an d D avies2 appealed to evidence not then available to me in a thesis by D r. C. J . Brown3. My than k s are due to Dr. A stbury for bringing th is interesting work to notice and to Dr. Brown for th e opportunity to read it. I do n o t think th a t it settles th e issue between th e angles 110° and 90° a t the oxygen of th e pyranose ring. The difference am ounts to ± 0-15 A. in th e b co-ordinate of Cl and C5 respectively, whereas th e author, rath er modestly, claims only an accuracy of ± 0 - 4 A. The features referred to by A stbury and Davies describe a regular six-sided figure—I presume th ey would not suggest th a t this is a precise description. In “the m ost detailed saccharide crystal analysis so far reported”, Cox and Jeffery4 conclude in favour of a slightly flattened form of th e Sachse trans form. This is the form I adopt and, moreover, th e strainless arm -chair form, though Dr. A stbury does not appear to recognize it nor appreciate its comfort. In these, as in other studies, reasonable agreem ent is found w ith forms based on th e 110° assum ption, b u t it remains to be proved th a t th e error in a tria l of 90° m ust be significantly greater. Meyer and Misch6 also assume 110°, b u t I cannot reproduce th eir param eters from th e ir geometrical assum ptions. A u n it o f length to fit into th e 10-3 A. identity period can be obtained b y assuming a regular ring of bonds of length 1 -50 A. (mean o f 4 C-C and 2 C-O bonds) b u t th is is too crude an approxim a tion. My calculations of th e rigorous form, w ith the screw axis as shown b y Meyer and Misch, give a length of 11-12 A. (Curiously enough th is is longer th an it would be if th e ring were a regular figure of 1-54 A. bonds.) W ith another choice of axis, th e chain m ight be buckled into the cell, b u t I have been unable to find a probable form in conform ity w ith the geometry and w ith the clearest features of the X -ray diffraction, from th e (h 0 I) zone. Cox8 recognizes th a t the form of th e molecule m ay be modified by interm olecular forces. This considera tion should m odify any dogm atism about th e u n known form of th e cellulose ring, b u t it does not seriously affect th e power of his elegant argum ent for a nearly co-planar arrangem ent of the sugar ring carbons’. S e p t e m b e r 23, 1944, v o l. 154 I t m ust be adm itted th a t direct evidence to decide between 90° and 110° for the oxygen angle in the cellulose ring is lacking. I f A stbury and Davies. Cox and Brown, Meyer and Misch, H aw orth and others assume an unstrained angle of 110°, they may do so in good company—b u t Pauling8 as well as Peirce m ust be excluded from the company. The variation o f the oxygen angle shows it to be deformable. I f one sees an elastic thread under an evident load, it is no speculation to assume th a t its unstrained length is less th an the observed length. In HjjO, the oxygen angle is 105° and it is distended by th e ionic character of the H fields. This ionic character is less in F aO and the angle is less, 100°. In H aS, the greater separation of the H fields means less repulsive stress and the angle is 92°. (These are th e values quoted by Pauling8.) W hen large groups are attached to the two bonds, th e angle is corre spondingly large, attaining 130° and more in the diphenyl ethers*>10. All this is in perfect accord with Pauling’s theory, th a t the oxygen bonds arise from p electrons and are unstrained a t 90°. I t is tru e th a t atom s of the appropriate size to enforce an angle of some 110°, Cl (in C120 ) and C, are not infrequently involved, b u t this obviously strained angle of a soft atom is not to be confused w ith the tetrahedral angle of the hard and symmet rical carbon atom . The latest figures on the aliphatic ethers give values of 110° or less11, and these are clearly strained by an otherwise imbalanced repulsion between the closely held carbon atom s. Dioxane (110°)12 looks more like a pyranose ring but, by sym m etry, the field round each oxygen atom m ust be closely sim ilar to th a t in dim ethyl ether. When th e two carbon neighbours of the oxygen are held also by a line of three carbon atoms, these can take some of th e stress from the oxygen bonds and even impose an opposite strain, if there be a minimum of free energy when a line of carbon atom s is co-planar. The position seems to be, therefore, th a t the un strained angle is 90° and the strain is unknown— so th e simplest assum ption is the strainless form, as given in m y note. The fact th a t it fits so neatly into the cellulose lattice commends it, b u t I would be the last to claim for the resultant structure any sta tu s beyond th a t of a tentative, approxim ate speculation, possibly useful as a working hypothesis to correlate the general body of data : and this is all th a t I would allow to any detailed crystal struc tu re ascribed to a macromolecular fibre. The param eters are given to 0-01 A. because they express the geometrical consequences of assumptions reasonably defined to th a t degree of accuracy. This basic, strainless form m ay later be strained to accord w ith direct evidence still to be found, but it seems w orthy of inclusion in ‘trial and error’ studies. To th a t end, it was offered through the speedy channel of the correspondence to Nature. F. B ritish Cotton Industry Research Association, Shirley Institute, Didsbury, Manchester. I P eirce, N ature, 153, 586 (1944). * A stb u ry an d D avies, N ature, 154, 84 (1944). • B ro w n , C. J ., P h .D . Thesis (B irm ingham , 1939). * Cox a n d Jeffery, N ature, 143 , 894 (1939). * M eyer a n d M isch, E elv. C him . Acta, 30, 894 (1937). * Cox, N ature, 154, 84 (1944). T Cox, Goodwin a n d W agstaff, J . Chem. Soc., 1495 (1935). ■ P auling, “ N a tu re o f th e Chem ical B ond” , p . 78 et eeq. (1939). * S u tto n an d Coop, J . Chem. Soc., 1869 (1938). 10 H am pson, F a rm e r a n d S u tto n , Proc. Boy. Soc., 143, 147 (1933). 11 S u tto n , A n n . R ep. Chem. Soc., 72 (1940). II G lasstone, A n n . Rep. Chem. Soc., 84 (1936). no. 3908, S e p t e m b e r 23, 1944 N A T U R E and Peng if the incident proton (or neutron) has an energy between 2 x 1 0 s eV. and 2 x 1010 eV. An example of this type of shower is reproduced in Fig. 1. The second type of shower, two examples of which are reproduced in Fig. 2, consists of penetrating particles coming from different directions. I t seems probable th a t this type of shower is an example o f the production of penetrating particles by a cascade process3'4. Bose, Choudhuri and Sinha6 have recently p u b lished a photograph which they claim shows the pro duction of mesons by a cascade process. To establish such a claim it is first necessary to prove th a t the shower is not an electron cascade, for electron cascade showers are very frequent while penetrating showers are rare ; and it is insufficient to state th a t th e Cloud Chamber Photographs of Penetrating Showers I n a long series of counter experiments, W ataghin, de Souze and Pom pia1, and Janossv2 and his co workers have established the existence of showers of penetrating particles different from electron cascade showers and knock-on showers. I t now seems prob able th a t the theory of cosmic-ray mesons p u t forward recently by Ham ilton, H eitler and Peng3 can account satisfactorily for these showers in term s of mesons (and neutrettos). These particles are assumed to be created by protons (or neutrons), of energies greater th an 2 x 1 0 ® eV. by cascade or m ultiple processes. More direct confirmation of this interpretation of the experimental results is desirable, and for this 1 F lQ . 1. AN EXAMPLE OF A SHOWER OF PENETRATING PARTICLES PRODUCED BY A MULTIPLE PROCESS. THREE PARTICLES CAN BE SEEN PASSING THROUGH THE LEAD PLATE. 399 2a 2b F ig . 2. Tw o EXAMPLES OF SHOWERS OF PENETRATING PARTICLES PRODUCED BY A CASCADE. IN (a), TWO PARTICLES CAN BE SEEN TO PASS THROUGH THE LEAD PLATE, WHEREAS IN (ft) THREE (AND POSSIBLY FOUR) PARTICLES PASS THROUGH THE PLATE. reason we have recently set up a cloud chamber con trolled by a set of counters which selects penetrating showers. The counter sets are arranged in three trays and are connected in sevenfold coincidence such th a t 95 per cent of all coincidences are caused b y pene tratin g showers. The middle and bottom tray s are surrounded by lead 15 cm. in thickness, and the total vertical thickness of lead is 53 cm. Electron cascade showers are thus effectively cut out. The top tra y is covered w ith lead 5 cm. in thickness, and the cloud chamber is placed between th e middle and bottom trays. Some th irty photographs have been obtained so far, and of these, eighteen photographs show pene tratin g particles which pass through a lead block, 2-3 cm. in thickness, w ithout m ultiplication. Nine of the eighteen photographs show showers consisting of two or more penetrating particles. The results are consistent w ith the assum ption th a t almost all penetrating showers contain ionizing pene trating particles. Further, they show th a t the ionizing particles themselves are penetrating, and are not soft ionizing secondaries to a non-ionizing pene trating radiation. The ionizing penetrating particles may, however, be accompanied by non-ionizing particles (for example, neutrettos). Showers of two main types occur among th e nine photographs. The first type, typical of almost all the published photographs of showers of penetrating particles, consists of penetrating particles originating a t one point, th a t is, particles produced by a m ultiple process. Janossy2 has shown th a t these showers are to be expected from the theory of H am ilton, H eitler shower contains mesons. Moreover, the one group of particles on Sinha’s photograph which clearly passes through the lead plate in the cloud chamber emerges accompanied by several electrons. I t is assumed th a t these are knock-on electrons produced by mesons, b u t this is very unlikely as the chance of a num ber of mesons producing several knock-on electrons is negligibly small. The multiplication of the particles in passing through the lead plate is, in fact, a clear indication th a t they are electrons and not mesons. G. D. R o c h e s t e r . Physical Laboratories, University, Manchester. 1 W a ta g h in , G., de Souze, M ., a n d P o m p ia, P . A ., Phys. R ev., 57, 61, 339 (1940). ’ Jśn o ssy , L ., P hys. R ev., 64 , 345 (1943). ! H a m ilto n , J ., H e itle r, W .,a n d P en g , H . ~W .,Phys. R ev., 64, 78 (1943). 4 P eng, H . W ., Proc. Roy. Ir is h A cad., 49 A , 245 (1944). • B o se ,D . M ., C houdhuri, B ., a n d S in h a, M ., P hys. R ev., 65, 341 (1944). Volcanic Contributions to the Atmosphere and Ocean II it be assumed, as is now again the fashion, th a t the nascent earth passed through a liquid stage, it is obvious th a t “the m olten spheroid . . . retained, occluded w ithin itself, some large p a rt of the w ater in th e present hydrosphere, as well as much of th e carbon dioxide represented by the present carbonates and carbonaceous deposits” 1. Most of the carbon dioxide th a t has become available as a source of 400 NATURE carbon is undoubtedly of volcanic origin, being de rived from magma. A useful estim ate of th e am ount of carbon th a t has been extracted from th e atm osphere b y various means has been made by Poole2, who, however, has unnecessarily revived th e theory th a t th is has been all present a t one tim e in gaseous com bination in a ‘prim itive’ atm osphere. Poole assumes th a t some o f th e fixed carbon has been derived from m ethane so present instead of from carbon dioxide—an assum ption he has considered necessary because of an apparent over-supply o f th e by-product oxygen if carbon dioxide were th e sole (or greatly p re dom inant) source of carbon. W hen, however, oxida tion of juvenile hydrogen throughout th e long history o f volcanic activ ity is taken into account, there is no longer any difficulty in accounting for th e dis posal of such an apparent surplus of atmospheric oxygen. A supply of oxygen for th is purpose m ust indeed be found if there is anything of value in th e theory of th e volcanic furnace. I t is permissible, and indeed necessary, therefore, to recalculate Poole’s estim ate of atm ospheric m ethane as carbon dioxide, a more likely atm ospheric gas. W hen th is is done, th e to ta l mass of carbon dioxide is 7 -02 x 10l *m etric tons ; and to this m ust be added 0-4 x 101* m etric tons of nitrogen now in th e atm o sphere, and also 0-18 X 101* m etric tons of juvenile hydrogen which has combined w ith th e surplus of oxygen liberated from carbon dioxide, giving a to ta l of 7-6 x 101* m etric tons of gases in w hat m ust be regarded as th e prim itive atm osphere (itself perhaps very scanty) together with the gases that have been emitted from volcanoes throughout the history of the earth. This excludes juvenile w ater vapour, which it is impossible to estim ate by this m ethod ; it has undoubtedly made a substantial contribution to th e ocean, however. F o r comparison, th e m ass of the atm osphere a t present, as given b y Poole, is 0-52 x 1018 m etric tons. One great advantage of recognition o f th e juvenile (magmatic) origin of carbon, as compared w ith the ‘prim itive atm osphere’ theory, is th a t it is in agree m ent w ith th e geological doctrine of uniform itarianism. I f one is to understand th a t doctrine in a forward-looking sense, a continuance of th e supply o f carbon from volcanoes will m ake possible th e accum ulation of fu rth er deposits of coal and lime stone in th e thousands o f millions of years of future geological tim e ; whereas in accordance w ith the ‘prim itive atm osphere’ theory th e supply of carbon for this purpose is exhausted, geological processes have worked themselves to a standstill, and we have arrived a t th e end of th e world. C . A. C o t t o n . Victoria U niversity College, W ellington, W .l. ‘ C ham berlin, T . C., a n d Salisbury, R . D ., Geology, 2, 90 (1900). • P o o le , J . H . J ., Sci. Proc. Roy. D u b lin Soc., 22, 345 (1941). The Deflexion of Light and Relativity I n a recent paper, E. F. Freundlich and W. Lederm ann1 have pointed out th a t “th e question remains unsettled w hether th e light deflection a t the sun’s limb am ounts to 1 -75" as predicted by the Theory of R elativity or w hether it is substantially larger, namely, equal to 2 •2" as indicated b y the findings of th e Potsdam Expedition of 1929 and con firmed by a renewed discussion of previous observa S e p t e m b e r 23, 1944, v o l. 154 tional m aterial”. The authors then proceed to discuss how an experiment can be. planned to settle the question so th a t the standard deviation of the final result does not exceed 0 •I". I f m is the solar mass and R the radius in natural units, 4m /R is the predicted deflexion2. B u t 2-2' means 5m /R. As the deflexion provides a crucial test of the theory, the question th a t is often asked is w hether relativity m ust be modified to give the result 5m /R instead of 4m /R. I t is well known th a t the Newtonian result, 2m/R, is obtained from the usual equation, where v0 is the velocity, Rdip/ds, a t the perihelion. F or light v0 — oo . The range 1 v0 oo corresponds to th e velocity Rd<p/dt lying between 0-70c and c. The deflexion is 5m /R for a particle for which v„ = 1 / 2 and Rdtfjdt is 0-82c. In the Newtonian theory there is no distinction between dt and ds, and hence v0 = i for light, b u t the second term of (4), which is of relativistic origin, is absent. I f the deflexion is really 2-2", one wonders if fast moving atomic particles, w ith velocities of the order of 0-8c, participate in the process leading to the observed result. V. V. N a b l i k a b . Benares H indu University. Aug. 13. • F reu n d lich , E . F ., a n d L e d e rm a n n , W ., M on. N ot. Boy. A st. Soc., 104, 40 (1944). * E d d in g to n , Sir A. S., " T h e M ath e m a tic a l T heory o f R e la tiv ity ” , 90 (1924). The Commutation of Annual Subscriptions M o s t learned societies allow future annual sub scriptions to be commuted by single paym ents which range from five to twenty-five tim es the annual sub scription w ith, in m any cases, a reduction to members of long standing. Although this is usually advant ageous to th e younger members, it is too expensive a t later ages when there is m ost interest in com m uta tion. There has thus arisen a growing demand for com m utation scales on an actuarial basis. Some examples of such scales m ay be given. The In stitu te of Actuaries, w ith an annual subscription of 3 guineas ceasing a t the age of seventy, requires a paym ent of 30 guineas a t age forty-five, w ith 1 guinea less for each additional year of age up to sixty and then by steps of 1$ guineas to a minimum of 7£ guineas a t sixty-five and over. The actuarial basis of this scale is not stated, b u t the amounts appear to be tw o thirds of those derived from a 3J per cent annuity table. The Royal Society now perm its commutation on paym ent of the am ount which the fellow would have to pay for a Government annuity on his own life No. 3908, S e p t e m b e r 23, 1944 N A T U R E of the am ount o f th e annual subscription. This varies w ith th e price of 2£ per cent Consols and the basis is a very stringent one, since th e am ounts p a y able are those required if fellows h ad entered into agreements to continue th eir annual subscriptions for the remainder of their lives. The most elaborate scale is th a t of th e Geological Society of London. The full table contains some thousands of entries ; it quotes th e com m utation fee for each age at election from tw enty to eighty, com bined with each num ber of annual contributions already paid, from nought to fifty. I t does not seem to have been noticed th a t, in general, age a t election plus num ber of annual contributions already paid equals present age. A part from a few unnecessary irregularities, th e vast table could be replaced by its top line w ith “age last b irth d ay ” substituted for “age a t election” or by its first column. The com m utation scales of these societies for ages forty to seventy, all expressed as per £1 of annual subscription, are summarized in th e accompanying table and graph, which also give suggested m aximum and minimum scales. The m axim um scale, which on the graph can scarcely be shown separately from th a t of the Royal Society, is based on th e M ortality of A nnuitants, 1900-1920, a(m) 3% U ltim ate. C o m m u ta t io n m b s p e r £1 o p annual s u b s c r ip tio n £ 401 percentage should be used. I t is suggested 50 per cent of the maximum should be regarded as the minimum. Women should pay slightly higher com m utation fees, b u t m ost societies will ignore this. In selecting a scale, sim plicity is more im portant th an adherence to exact actuarial values ; in most cases either a single arithm etical progression or possibly two, as used by the In stitu te of Actuaries, will suffice. Thus the minimum com m utation scale for a society with an annual subscription of 5 guineas m ight be 70 guineas a t age twenty-five and decrease by one guinea for each additional year of age to a m inimum of 20 guineas a t age seventy-five. W hat should be done w ith such com m utation fees ? Most societies invest the whole of them and transfer to ordinary income only the interest earned ; they thus build up useful hidden reserves in their accounts. Some fu rth er transfer to ordinary income is, however, reasonable and, in the absence of periodical actuarial investigation, it will in the long run be found satis factory to transfer to ordinary income, in addition to the interest earned on the com m utation fee fund, some small portion of each com m utation fee received. This m ay be, say, one sixth, or alternatively the am ount of one annual subscription. Only the balance of each com m utation fee would then be invested. D a v id H eron. 2 The Orchard, Bedford Park, London, W.4. Aug. 4. Mr. W . L. Sclater years after his friends—Dr. A. C. Stark, the brothers H . P. and W. Francis and F. C. Selous— had lost their lives by enemy action, W. L. Sclater also fell a victim to enemy action1. Sclater was director of the South African Museum from 1896 to 1906. H e was appointed director when the new building (the present one) had ju st been completed, and his was the task of planning the arrangem ent of the exhibits. In the main his original plan persists, though w ith the logical alterations and extensions made possible by the addition of a new wing in recent years. The late Dr. Peringuey was already on the Museum staff as entomologist. Sclater proceeded to assemble, as members of the staff or as honorary curators, a body of scientific workers to under take research on the Museum collections : the late Dr. W. F. Purcell for invertebrates, the late Dr. Gilchrist for marine biology, the late Dr. Corstorphine for geology, and afterwards Dr. Rogers (happily still w ith us), and the late Dr. Pearson for botany ; he himself took charge of the vertebrates. The acquisition of speci mens was extended and accelerated by regular museum correspondents in all p arts of the country, and the collections grew a t a pace which has scarcely been exceeded in recent years, except in the various groups of invertebrates, even w ith the Museum’s increased staff and facilities for field work. To him was due the appointm ent of a promising young taxiderm ist, Mr. J . D rury of P erth, whose talents reached full fruition only after Sclater had resigned the directorship, and resulted in the unique series of casts of living Bushmen. K. H . B a e n a b d . South African Museum, Cape Town. Many 40 50 60 70 Age la s t b irth d a y (years). Any society which wishes to in stitu te a scale of commutation fees should, I think, tak e into account the normal rate of w ithdraw al from its ranks. The suggested maximum scale, which assumes th a t w ith drawals are impossible, will rarely, if ever, be applic able, and in general some percentage of th e m axim um should be used. W here w ithdraw als are rare, the percentage should be nearly 100 per cent, b u t where withdrawals are more frequent, as in societies th e members of which are loosely held together only by a common interest in some field of activity, a lower 1 N ature, 154, 204 (1944). 402 N A T U R E OCCASIONAL WHITENESS OF THE DEAD SEA By Dr. R. BLOCH and H. Z. LITTMAN Palestine Potash, Ltd., Jerusalem and D r. B. ELAZARI-VOLCANI Daniel Sieff Research Institute, Rehovoth N the morning of A ugust 25, 1943, it was observed th a t the whole D ead Sea, which a t this season is always perfectly clear, had become m ilky „white. The same observation was m ade on the sam e morning a t the northern and southern ends, which are seventy kilometres ap art, and it was fu rth er ascertained th a t during th a t night th e whole Dead Sea h ad turned white. During w inter storm s a seam of some 100 m etres occurs frequently along the shores, tu rb id and yellowish, b u t it was never observed th a t th e whole Dead Sea surface had turned white. The tu rb id ity gradually disappeared an d in December 1943 the w ater became alm ost clear again. O S e p t e m b e r 23, 1944, v o l. 154 carbonate. Moreover, the tu rb id ity of other samples dissolved readily on adding hydrochloric acid, de veloping carbon dioxide. On a rough calculation, one million tons of calcium carbonate seem to have spread over the whole Dead Sea during the night. There is no obvious explana tion for this phenomenon. There was only the usual slight wind blowing from both the northern and southern shores towards the centre o f the Sea. No earthquake was registered before or after the night in question, and the occurrence of a slight trem or 12 and 16 days later (September 6 and 10) offers no explanation. D r. M. R. Madwar, director of the Helwan Observatory, Egypt, informs us th a t no other nearby earthquakes were recorded. We inquired, therefore, w hether the phenomenon which we had witnessed had ever been observed before. The Dead Sea has been under close observa tion since 1921, when Mr. M. Novomejsky, the founder and managing director o f the Pales tine Potash L td., started his experimental installa tions and observation posts. D uring this period no such phenomenon is known to have occurred. In th e nineteenth and the early tw entieth centuries several scientific men visited the D ead Sea b u t none o f them (Schubert, Russegger, Robinson, Wilson, W elcotts, Seetzen, Castigan, Scott, Molineux, Lynch, L arter, Blanckenhom) has ever said anything about the Dead Sea being white. When a t our suggestion a prelim inary survey of Hellenistic literature was made, a quotation from the famous Greek physician Galen, who visited the Dead Sea a t about a . d . 158, was found* in his “De Simplicium Medicamentorum F acultatibus” 1, stating th a t the waters o f the Dead Sea “appear a t first glance w hiter and heavier than all Seas” , ( t o 8k ty js !v n<xXaaTiv)f) E vp£a Xtjxvr]? OScop, -ip ovo[i<&i;ov(j(v oJ f/lv O iX aoaav vexpdv, ot Se Xi(xv7)v a<ręaX-rtTiv . . . x a x a t})v S'J'ni euO uj a[i.a 7iaor)ę GaXdcarar]? \evx6 repov t ż xat Tra/ilTEpov ęouveTat.) F ig . 1. M a p of th e D e a d S e a , s h o w in g t h e r e l a t iv e t u r b id it y OP THE s u r f a c e l a y e r . The nephelometric analysis of several w ater samples tak en on October 10, 1943, revealed th e distribution o f the tu rb id ity as shown in th e m ap (Pig. 1). The num bers represent th e relative turbidity, th e lowest value taken as unity. Samples a t different depths taken a t point A in th e m ap showed the following relative tu rb id ity : D e p th in m e tre s R elativ e tu rb id ity .. .. 0 1 *3 2 1 *2 3 1 *1 5 1 *5 10 1 *9 15 20 1 *1 < ^ 1 50 c le ar A sample of 30 litres was tak en a t place B and filtered. I t contained 0-018 gm ./litre of a white solid o f which 15 per cent was insoluble in diluted hydro chloric acid, 5 per cent was insoluble in concentrated hydrochloric acid, and 80 per cent was calcium As the purpose of Galen’s journey was to establish the usefulness o f its waters for the preparation of drugs, he m ust have surely m eant th a t the w ater itself was white, and not the appearance of the sea a t certain hours of the day as Russegger2 described it in 1815. Thus Galen appears to be so far the only reliable investigator who mentions the Dead Sea as being white, although this place was repeatedly described during the Rom an occupation of Palestine. In this connexion it m ay be w orth mentioning th a t in the Bible (Genesis, 14, 3) the sentence occurs : “ . . . in the vale of Siddim, which is the salt sea”. The word “Siddim” has no connexion w ith “Sodom” , the Hebrew spelling of which is quite different, but could be the plural of the Hebrew “Sid”, which means lime. I f th a t be an indication th a t the Dead Sea was white in A braham ’s time, then the following observation m ight lead to some better knowledge of Biblical times. We have seen th a t hum an records have very little to tell about this outstanding event in the history of the Dead Sea. B ut we have found m uch more in the books of N ature. One of us3 obtained during December 1941 from the bed of the Dead Sea a num ber of profiles 10-170 cm. long, from depths varying from 70-330metres and taken a t different places. On dissecting the longest profile a ‘spectrum ’ of layers of different colours—black, dark-blue, grey, brown and white—was revealed. * F iusser, H ebrew U niversity, Jeru sa le m , p riv a te com m unication. xo. 3908 , S e p t e m b e r 23, NATURE 1944 The thickness of the dist inct white layers is 0-3-6 mm. It is interesting to note th a t the White zones of sedi m ent form no seasonal repeat pattern . The following table shows the result o f analyses of th e d ry sub stance of two w hite layers (Nos. 1 and 2) and o f some d ark m aterial (No. 3 ); these were made two years after taking the profile. N o. D istance from to p o f profile (cm .) .. Calcium c arb o n ate (per cen t) .. .. Insoluble in hydrochloric acid (per c en t) 1 38 70 7 2 52 81 3 53-58 38 35 The identity of colour and chemical composition of the w hite layers w ith th e m aterial causing the turbidity is striking. We therefore assume th a t each white layer of th e Dead Sea bed is caused by an outbreak of turbidity, and th a t sim ilar outbreaks occurred earlier and are distinctly recorded on the profile. The dark layers, containing m uch more silicates, are formed by th e m ineral m aterials brought annually into the Dead Sea during the norm al periods between outbreaks of turbidity. Hence, an exceptional opportunity is thereby offered to investigate the history of the Dead Sea chronologically, and to detect the tim e of sim ilar ‘blanchings’ in history by lixing the thickness of the annual dark sedim entation which settles on the ‘white law n’ th a t has formed during the last outbreak. 403 I t m ay, however, be possible to find later on the correlation between the rise of sea-level and the ‘blanching’ of the Dead Sea and thereby to determine th e sea-levels which existed in the past. We have, of course, tried m any explanations for the phenomenon described, b u t none of them is as yet well enough founded to be o f sufficient general interest. Owing to w ar tim e conditions, it W a s unfortunately not possible to make more exhaustive observations and measurements, b u t it is hoped to clarify some tim e later the various questions by systematic borings of the Dead Sea bed, and by a careful study of the ancient literature on Palestine and the Dead Sea. We hope th a t the results will not only be im portant from geological or even technical aspects, in affording an exact knowledge of sealevels a t different times, b u t also for students of history and of the Bible, since there is a close link between the Dead Sea and the development of religion. We wish to extend our thanks to the managing director of the Palestine Potash Ltd., Mr. M. Novomejsky, and to those of the Company’s staff, who were helpful w ith suggestions and m easure ments, especially to Messrs. Campbell, Cahaner, Shirisly and Schnerb. 1 G alen, “ I ) ' Sim plicium M edicam entorum F a c u lta tib u s ” , IV , 2 0 ; ed itio K iih n , X I , 690. 'R i t t e r , C., “ Die E rd k u n d e von A sien” , 764 V /II, p a r. 9 (B erlin, 1850). 3 E lazari-V olcani, B ., N ature, 152 , 274 (1943). INDIAN UNIVERSITY ARCHITECTURE N a paper read before the Indian Institu te of Architects early this year, Nawab Zain Y ar Jung IBahadur, chief architect, H yderabad State, dealt Fig. 2. T e m p e r a t u r e of D ead S ea w a t e r a t d if f e r e n t d e p t h s AND TIMES. Another phenomenon connected with the spon taneous occurrence of tu rb id ity is th e change in tem perature which took place in th e D ead Sea water. I t has been assumed th a t th e w hite colour of the surface w ater m ust cause arise in reflexion of the sun’s rays. The assumption was confirmed by m easurem ents o f tem perature a t different depths, which are repre sented in Pig. 2. We find a difference of as much as 8° C. in October 1943 as compared w ith October 1940, a t the depth of 15 m. below th e surface. I t is noteworthy th a t th e tem perature of deeper strata rose again when th e tu rb id ity slowly disappeared. This occurred in spite of the fact th a t the tem perature nearer the surface was then lower owing to the p ro gressing winter season. I t is therefore m ost probable th a t the lower tem perature in 1943 was not caused by fluctuation of atmospheric tem perature b u t by the stronger reflexion of the sun’s rays. I t may also be assumed th a t th e lower tem perature has caused a corresponding reduction of evaporation, b u t measurements of the sea-level gave no clear pic ture, because the quan tity of rainfall during th e pre ceding winter season was exceptionally large and evaporation during the first m onth of 1943 was low. w ith the design of a residential university, as exem plified in the new Osmania University in H yderabad. This has been planned on the American campus principle on a site of 1,600 acres, giving ample space for future expansion and the inclusion of well laid-out grounds of impressive dimensions. The author had previously made a fairly thorough study of university architecture both in Europe and the U nited States, in which connexion he expressed pleasure a t the evidence of a m aster plan in the design of the English universities of Birmingham and N ottingham , but regrets th a t it is less evident in the case of Edinburgh and Leeds and in m ost of the Indian universities. The Osmania U niversity is located in somewhat hilly and picturesque country a t Adigmet, a village between H yderabad and Secunderabad to the north east of the city, nearly 200 ft. above the level of the city, of which it commands beautiful views. Among th e ridges on which the U niversity is being built the highest has been set ap art for the senate hall, which is to be a m onum ental building and the keystone of th e whole project. On one side of it is the arts college, already completed, and on the other the library and law college will be built. These will form the central group of the main axis. There are tw o ridges stretching from the senate hall h ill: on th e left ridge all the science colleges are or will be located, three of which—physics, chemistry, and biology—are already under construction. The ridge to the right has been reserved for the museum and th e training college, the training school, the school of arts and the a rt gallery. The hostels and dining halls are situated in the loop behind the science no. NATURE 3908, S e p t e m b e r 23, 1944 The thickness of the distinct w hite layers is 0-3-6 mm. It is interesting to note th a t th e White zones of sedi ment form no seasonal repeat p attern . The following table shows th e result o f analyses of th e d ry sub stance of two w hite layers (Nos. 1 and 2) and o f some dark m aterial (No. 3 ); these were made two years after taking the profile. No. D istance from to p o f profile (cm.) Calcium carb o n ate (per cen t) .. Insoluble in hydrochloric acid (p er c en t) 1 38 70 7 2 52 81 3 3 53-58 38 35 The identity of colour and chemical composition of the w hite layers w ith th e m aterial causing the turbidity is striking. We therefore assume th a t each white layer of th e Dead Sea bed is caused by an outbreak of turbidity, and th a t sim ilar outbreaks occurred earlier and are distinctly recorded on the profile. The d ark layers, containing m uch more silicates, are formed by the m ineral m aterials brought annually into the Dead Sea during the norm al periods between outbreaks of turbidity. Hence, an exceptional opportunity is thereby offered to investigate the history of th e Dead Sea chronologically, and to detect the tim e of sim ilar ‘blanchings’ in history by fixing the thickness of the annual d ark sedim entation which settles on th e ‘w hite law n’ th a t has formed during the last outbreak. 403 I t m ay, however, be possible to find later on the correlation between the rise of sea-level and the ‘blanching’ of the Dead Sea and thereby to determine the sea-levels which existed in the past. We have, of course, tried m any explanations f o r the phenomenon described, b u t none of them is as yet W e ll enough founded to be of sufficient general interest. Owing to w a r tim e conditions, it W a s unfortunately not possible to make more exhaustive observations and measurements, b u t it is hoped to clarify some tim e later the various questions by system atic borings of the Dead Sea bed, and by a careful study of th e ancient literature on Palestine and the Dead Sea. We hope th a t the results will not only be im portant from geological o r even technical aspects, in affording an exact knowledge of seal e v e l s a t different times, b u t also for students of history and of th e Bible, since there is a close link between the Dead Sea and the development of religion. We wish to extend our thanks to the managing director of the Palestine Potash L td., Mr. M. Novomejsky, and to those of the Company’s staff, who were helpful w ith suggestions and m easure ments, especially to Messrs. Campbell, Cahaner, Shirisly and Schnerb. 1 G alen, “ De Sim plicium M edicam entorum F a c u lta tib u s ” , IV , 20 ; ed itio K iih n , X I , 690. ’ R itte r , C., “ Die E rd k u n d e von A sien” , 764 V /II, p a r. 9 (B erlip, 1850). 8 Elazari-V olcani, B ., N ature, 152, 274 (1943). INDIAN UNIVERSITY ARCHITECTURE N a paper read before the Indian Institu te of Architects early this year, Nawab Zain Y ar Jung IBahadur, chief architect, H yderabad State, dealt F ig . 2. T e m p e r a t u r e of D ead Sea w a t e r a t d if f e r e n t d e p t h s AND TIMES. Another phenomenon connected with th e spon taneous occurrence of tu rb id ity is th e change in tem perature which took place in the D ead Sea water. It has been assumed th a t th e w hite colour o f the surface w ater m ust cause a rise in reflexion of the sun’s rays. The assumption was confirmed by measurements of tem perature a t different depths, which are repre sented in Pig. 2. We find a difference o f as much as 8° C. in October 1943 as compared w ith October 1940, a t the depth of 15 m. below the surface. I t is noteworthy th a t the tem perature of deeper stra ta rose again when th e tu rb id ity slowly disappeared. This occurred in spite of th e fact th a t th e tem perature nearer the surface was then lower owing to the p ro gressing winter season. I t is therefore most probable th at the lower tem perature in 1943 was not caused by fluctuation of atmospheric tem perature b u t by the stronger reflexion of the sun’s rays. I t may also be assumed th a t th e lower tem perature has caused a corresponding reduction of evaporation, but measurements of th e sea-level gave no clear pic ture, because th e q uantity of rainfall during th e p re ceding winter season’ was exceptionally large and evaporation during the first m onth of 1943 was low. w ith the design of a residential university, as exem plified in the new Osmania U niversity in H yderabad. This has been planned on the American campus principle on a site of 1,600 acres, giving ample space for future expansion and the inclusion of well laid-out grounds of impressive dimensions. The author had previously made a fairly thorough study of university architecture both in Europe and the U nited States, in which connexion he expressed pleasure a t the evidence of a m aster plan in the design of the English universities of Birmingham and N ottingham , but regrets th a t it is less evident in the case of Edinburgh and Leeds and in m ost of the Indian universities. The Osmania U niversity is located in somewhat hilly and picturesque country a t Adigmet, a village between H yderabad and Secunderabad to the n o rth east of the city, nearly 200 ft. above the level of the city, of which it commands beautiful views. Among the ridges on which the U niversity is being built the highest has been set a p art for the senate hall, which is to be a m onum ental building and the keystone of the whole project. On one side of it is the arts college, already completed, and on the other the library and law college will be built. These will form the central group of the main axis. There are two ridges stretching from the senate hall h ill: on the left ridge all the science colleges are or will be located, three of which—physics, chemistry, and biology—are already under construction. The ridge to the right has been reserved for the museum and the training college, the training school, the school of arts and the a rt gallery. The hostels and dining halls are situated in the loop behind the science no. 3908, S e p t e m b e r 23, 1944 The thickness of the distinct w hite layers is 0-3-6 mm. It is interesting to note th a t th e White zones of sedi ment form no seasonal repeat p attern . The following table shows th e result of analyses of th e d ry sub stance of two w hite layers (Nos. 1 and 2) and o f some dark m aterial (No. 3 ); these were made two years after taking the profile. No. Distance from to p o f profile (cm.) .. Calcium carb o n ate (per c en t) .. .. Insoluble in hydrochloric acid (per c e n t) l 38 70 7 403 N A T U R E 2 52 81 3 53-58 38 35 The identity of colour and chemical composition of the w hite layers w ith the m aterial causing the turbidity is striking. We therefore assume th a t each white layer of th e Dead Sea bed is caused by an outbreak of turbidity, and th a t sim ilar outbreaks occurred earlier and are distinctly recorded on the profile. The dark layers, containing m uch more silicates, are formed by th e m ineral m aterials brought annually into the Dead Sea during the norm al periods between outbreaks of turbidity. Hence, an exceptional opportunity is thereby offered to investigate the history of the D ead Sea chronologically, and to detect the tim e of sim ilar ‘blanchings’ in history by fixing the thickness of th e annual d ark sedim entation which settles on the ‘w hite law n’ th a t has formed during the last outbreak. I t m ay, however, be possible to find later on the correlation between the rise of sea-level and the ‘blanching’ of the Dead Sea and thereby to determine the sea-levels which existed in the past. We have, of course, tried m any explanat ions for the phenomenon described, b u t none of them is as yet W e ll enough founded to be of sufficient general interest. Owing to w a r tim e conditions, it W a s unfortunately not possible to make more exhaustive observations and measurements, b u t it is hoped to clarify some tim e later the various questions by system atic borings of the Dead Sea bed, and by a careful study of the ancient literature on Palestine and the Dead Sea. We hope th a t the results will not only be im portant from geological or even technical aspects, in affording an exact knowledge of sealevels a t different times, b u t also for students of history and of the Bible, since there is a close link between the Dead Sea and the development of religion. We wish to extend our thanks to the managing director of the Palestine Potash L td., Mr. M. Novomejsky, and to those o f the Company’s staff, who were helpful w ith suggestions and m easure ments, especially to Messrs. Campbell, Cahaner, Shirisly and Schnerb. 1 G alen, “ J> ■ Sim plicium M edicam entorum F a c u lta tib u s ” , IV , 2 0 ; ed itio K iih n , X I , 690. ’ R itte r , C., “ D ie E rd k u n d e von A sien” , 764 V /II, p a r. 9 (B e rlir, 1850). s Elazari-V olcani, B ., N ature, 152, 274 (1943). INDIAN UNIVERSITY ARCHITECTURE N a paper read before the Indian Institu te of Architects early this year, Nawab Zain Y ar Jung IBahadur, chief architect, H yderabad State, dealt Fig. 2. T e m p e r a t u r e of D ead S ea w a t e r a t d if f e r e n t d e p t h s AND TIMES. Another phenomenon connected w ith th e spon taneous occurrence of tu rb id ity is th e change in tem perature which took place in th e D ead Sea water. I t has been assumed th a t the w hite colour o f the surface w ater m ust cause a rise in reflexion of the sun’s rays. The assumption was confirmed by measurements of tem perature a t different depths, which are repre sented in Pig. 2. We find a difference o f as much as 8° C. in October 1943 as compared w ith October 1940, a t the depth of 15 m. below th e surface. I t is noteworthy th a t the tem perature of deeper stra ta rose again when th e tu rb id ity slowly disappeared. This occurred in spite of the fact th a t th e tem perature nearer the surface was then lower owing to the p ro gressing winter season. I t is therefore m ost probable th at the lower tem perature in 1943 was not caused by fluctuation of atmospheric tem perature b u t by the stronger reflexion of the sun’s rays. I t may also be assumed th a t the lower tem perature has caused a corresponding reduction of evaporation, but measurements of th e sea-level gave no clear pic ture, because th e q uantity of rainfall during th e p re ceding winter season’ was exceptionally large and evaporation during the first m onth of 1943 was low. with the design of a residential university, as exem plified in the new Osmania U niversity in H yderabad. This has been planned on the American campus principle on a site of 1,600 acres, giving ample space for future expansion and the inclusion of well laid-out grounds of impressive dimensions. The author had previously made a fairly thorough study of university architecture both in Europe and the U nited States, in which connexion he expressed pleasure a t the evidence of a m aster plan in the design of the English universities of Birmingham and N ottingham , but regrets th a t it is less evident in the case of Edinburgh and Leeds and in m ost of the Indian universities. The Osmania University is located in somewhat hilly and picturesque country a t Adigmet, a village between H yderabad and Secunderabad to the north east of the city, nearly 200 ft. above the level of the city, of which it commands beautiful views. Among the ridges on which the U niversity is being built the highest has been set ap a rt for the senate hall, which is to be a m onum ental building and the keystone of the whole project. On one side of it is the arts college, already completed, and on the other the library and law college will be built. These will form the central group of the main axis. There are two ridges stretching from th e senate hall hill : on the left ridge all the science colleges are or will be located, three of which—physics, chemistry, and biology—are already under construction. The ridge to the right has been reserved for the museum and the training college, the training school, the school of arts and the a rt gallery. The hostels and dining halls are situated in the loop behind the science 404 N A T U R E colleges, and the residential area for the teaching staff is beyond the hostels. In addition to these, sites have been selected for the medical college and hospital, the colleges of agriculture and forestry, th e college for women, a students union, a faculty club, a m arket, a post and telegraph office, botanical garden, stadium , gym na sium, swimming pool, and a colony for subordinates and servants. I t is interesting to note, in regard to acoustics, th a t only large lecture theatres have been given acoustical treatm ent, and only those rooms where quiet is absolutely essential, owing to th e heavy cost of acoustic materials. One of the main causes of disease in Ind ia is said to be the im purity of drinking w a te r ; and the question of having separate drinking w ater for caste H indus is also a problem for schools and colleges which cannot be ignored. To m eet fully the special needs in this respect and minimize risk of infectious disease, modern drinking fountains are being installed throughout. In regard to style, th e author said th a t in other im portant countries of the world the science of architecture has m ade rapid progress, b u t in India he thinks they are sadly behind th e times ; and in spite of th e money th a t has been and is being spent on educational institutions, he has seen nothing yet of real architectural value. “In fact some of the buildings are so poorly designed and so badly con structed th a t they are a blot on th e landscape and invoke in the heart an unholy desire to pray for an earthquake or fire.” The reigning Nizam, who has taken a keen interest in the new University, expressed the wish th a t, while possessing all m odern facilities, it should have no W estern elements in its architecture. Speaking of the a rts college a t the tim e of his Jubilee, His E xalted Highness said th a t “th e architecture of this building represents a blending of th e H indu and Muslim styles, and the a rt and culture of both these races are reflected in th e pillars and traceries and carvings on the doors and walls. Thus the building symbolises th e close contacts and friendly relations subsisting for centuries between th e various classes of m y subjects. . . . The Osmania U niversity should not only be a repository of H yderabad’s best traditions, a model of its high culture ; it should also aim a t broadmindedness and m utual toleration and unity among th e students, for in th a t ideal lies the well-being and the prosperity of this S tate” . The author has accordingly embodied the H indu and Muslim cultural elements of all periods in th e State, such as th e Buddhist, Jain, Brahmanic, Bahmani, K utub Shahi and Moghal. These have all been blended to form a composite whole, signifying the evolution of a new style which should distinguish His E xalted Highness’s reign from all th e other rulers in the history of the Asafjahi dynasty. The arts college which, a t th e beginning of this year, was the only completed building in the scheme, covers an area of 250,000 sq. ft. and is designed to accommodate two thousand students. I t is a twostoried structure, w ith basem ent, built entirely of local granite of pink and grey shades, w ith the inner walls plastered and th e outer surface in ashlar masonry. All the rooms are finished, in plain white lime plaster, except the entrance hall, whe^e stucco is used. The dome surm ounting th e entrance hall is about 50 ft. in diameter, resting on corbel slabs. The entrance hall is built in reinforced cement con crete, and is 66 ft. from floor to ceiling. The main roof and interm ediate floors and staircases are con S e p t e m b e r 23, 1944, vol. 154 structed in reinforced cement concrete. All the floors are paved w ith polished Shahabad stones from the regions of Tandur and Nawandgi in Hyderabad State, with the exception of the entrance hall, where the floor is red terrazzo. The m ost difficult and slow p a rt of the work was the process of stone-dressing, as the local granite is of the hardest variety. The stone lintels over the massive columns of the ground floor verandah of the arts college weigh about seven tons each and are 18 in. in span. The stones used for the decorative cornices weigh 2 J-3 J tons each. The complete woodwork (including furniture) of the entire buildings is being carried out in the best Rangoon teak. 4,000-5,000 workmen were engaged during the first year or two of the construction work. In addition to local labour m any stone-dressers and artisans were im ported from southern towns such as Tanjore, Turkapalam and the Conjivaram, to assist directly w ith the work and also to train the local workers. The whole scheme is expected to cost a little over two crores, and the author replies to some criticism on the ground th a t far too m uch money is being expended on the new University. Before he had seen some of the world’s greatest educational centres he was inclined to agree th a t the cost should be kept low ; b u t examples in other parts of the world con vinced him th a t the University is a nation-building institution in the best sense of the term ; the future of the younger generations and of the State itself will obviously depend on the type of University. I t is concluded th a t if the people of India are to be brought physically and m entally to the same level as those of other civilized nations, it is vital th a t the new University, and others in India, should be built on the principles accepted and the standards fixed in other countries ; and it is quite certain th a t H ydera bad is a big enough State to think of a big university w orthy of itself and of its traditions. EAST AFRICAN ARCH/EOLOGY IVE diitinct types of polished stone axe have been recognized in E.ist Africa. Most of the specimens F found were pecked and not ground into shape before being finally polished. No geographical significance can be attached to any of the five ty p e s ; their distribution will probably be found to be very wide, though for the moment for obvious reasons they have m ostly turned up where European settlem ent in volving farming has taken place. A description of the various types, together w ith p list of some of tho localities where they have been found, has been made ava ilable in a collection of reprints recently received*. A general sketch m ap, too, is appended. Finally, a short note on the occurrence of the different types outside E ast Africa concludes the article. Gorgora, on Lake Tana, was a former Italian m ilitary station. The rock-shelter is situated some 150 ft. up in the side of a conical hill of volcanic rock which rises abruptly from the plain some three miles from the Lake. The shelter is most inaccessible and can only be approached from one direction. I t is some 15 ft. long by 8 ft. a t the widest. Black soil rich in humus was found from the surface to a depth • “ N otes on th e G round an d Polished S tone A xes o f E a s t A frica” , b y M ary D . L e a k e y ; “ E x c avations o f a R ock-S helter a t Gorgora, L ake T a n a , E th io p ia ” , b y Colonel F . M o y se y ; “ The In d u strie s o f th e G orgora R ock-S helter, L ake T a n a ” , b y L. S. B. Leakey. R ep rin ts o f th e Journal o f the E ast A frica and Uganda N atural H istory Society. 17, Nos. 3 an d 4 (77 a n d 78), 182-203. no. 3908, S e p t e m b e r 23, 1944 of 4 ft. ; then to the 9-ft. level there was a grey volcanic ash. A t this level, concretions appeared, and these formations increased down to th e 12-ft, level. Implements occurred throughout the deposits, and pottery was found to a depth o f 3 ft. from the surface. There were no sterile layers. Dr. Leakey’s analysis shows th a t the industries of the 12-, 11- and 10-ft. levels can be classified as E arly Stillbay ; those from the 9-, 8- and 7-ft. levels as Middle Stillbay ; those from the 6 -, 5- and 4-ft. levels as Upper Stillbay ; those from the 3-ft. level as Magosian ; those from the top 2 ft. of deposit as late Mesolithic or Neolithic. This industry in cludes some crude microliths, and appears to be de rived from the earlier Magosian. A few simply decorated sherds were also discovered in this level. The industries from the older levels are fairly typical, but the 4-ft. level gives us a transition stage betweer. the latest Stillbay and th e Magosian. An analysis of the different types of artefact found is given, and the article is well illustrated. The rock-shelter a t Gorgora is obviously of some importance. Such transition industries as those of the top 2 ft. and the 4-ft. level are very interesting. The excavations are not yet completely concluded, and it is to be hoped th a t furth er investigations a t this site and elsewhere in th e neighbourhood will be undertaken a t a not too d istant date. M. C. B t j b k it t . QUARTZ CRYSTAL MODEL IF F E R E N T types of deformation extend the range of frequencies th a t quartz plates can cover and a single plate m ay be used for totally different ranges when m ade to vibrate in different modes. To obtain most of these various modes of vibration the plates m ust be cut from th e m other quartz a t different angles w ith respect to th e electrical, mechanical and optical axes of the quartz crystal. There are also special orientations which provide b etter frequency stability in cases of tem perature changes, and these orientations are used where stringent tem perature requirem ents apply. A recent interesting article by F. Caroselli (Bell Lab. Rec., 22, No. 9 ; May 1944) describes and illus trates a large fabricated model of a quartz crystal, employed for showing more clearly th e angular rela tions of the various cuts of plates to th e original m other crystal. The model has an outer shell about two feet high th a t shows the typical shape of quartz as it grows in N ature, and an inner display of crystal plates. The shell and display ti£rs are m ade of sheet Incite and the plates are lucite, roughened to appear like etched quartz. The plates include those used for oscillators and filters. About the vertical axis the outer shell shows an array of faces th a t repeat three times in exact sym m etry. This is th e optical axis, and it is the only direction through quartz along which a light ray will travel w ithout dividing into two rays of different velocities which are refracted by different amounts. The shell can be ro tated w ith respect to th e inner display so th a t its faces can assume three identical orientations w ith respect to th e crystal plates. Three pairs of X and Y axes are m arked on th e apron of the model to dem onstrate th e trigonal sym m etry of quartz. Before constructing the outer shell of th e model, formulae were developed from published crystallo- D 405 N A T U R E graphic d ata to compute the angles between adjacent faces. All identical faces were made the same size by having the m ajor apex faces meet in the vertical axis of th e model. Minor apex faces were located a t an arb itrary distance from this central axis. The model illustrates cuts used in ranges varying from less th an 1 kc. to 24,000 kc., and each one is p a r ticularly suited for a definite range of frequency. In addition, there are several different cuts operating over the same range b u t having some specific char acteristic. On the top tier of the display there is a plate the coating of which is divided so th a t it will vibrate by flexing the m ajor surfaces ; and on the bottom tier are a num ber of plates of the same cut b u t with the coating divided to excite the third, the fifth or seventh harmonics of a longitudinal mode of vibration. COLOUR TELEVISION DEMONSTRATION was given a short tim e ago by Mr. J . L. B aird of his recent achievements of th e reception of television in colour by a m ethod which avoids the need for revolving disks and lenses ; th e apparatus is thus silent in operation and is claimed to be as efficient as the pre-war black-andwhite receivers. The pictures in colour are also utilized to produce stereoscopic effects by the use of coloured viewing glasses, the left and right eye pictures corresponding to the left and right eye images. F or the reproduction of the received pictures a special cathode ray tube, term ed a ‘Telechrome’, is used ; this differs from the ordinary tube in having two cathode ray beams and a transparent double sided screen. These two cathode ray beams are m odulated by the incoming signals corresponding to th e two prim ary colour pictures ; and they impinge obliquely on opposite sides of the screen, these sides being coated with fluorescent powders of the appro priate colours. Thus the screen has formed upon its front face an image containing the orange-red colour components, and on its back face an image containing the blue-green components. W hen th e screen is viewed norm ally from the front, these images are superimposed and thus give a picture in n atu ral colour. Such a two-sided tube has been developed w ith a screen, 10 in. in diameter, and was shown receiving a picture from a 600-line triple interlaced moving spot transm itter using a cathode ray tube in com bination w ith a revolving disk w ith orange-red and blue-green filters. The tube gives a very bright picture due to the absence of colour filters and the fact th a t special powders are used giving only the desired colours, which are seen additively. A m ethod of using three colours has also been described in a p aten t specification. In this case, th e back of the screen is ridged : the two sets of faces of the ridges are coated w ith blue and green powders respectively ; and they are scanned by two cathode ray beams, m odulated by the blue and green components respectively, of the incoming signals. The th ird beam, carrying the red picture components, impinges on the front of the screen as before. A new form of scanning is also being explored, using successive lines of different colour, with the object of reducing the colour flicker which is obtained when, as a t present, th e colour changes are by fram e to frame only. A 406 N A T FORTHCOMING EVENTS Saturday, September 23 B r i t i s h P s y c h o l o g ic a l S o c i e t y ( a t th e London School o f H ygiene a n d T ropical M edicine, K eppel S tr e e t, L ondon, W .C .l), a t 2.30 p.m .— P rof. J . C. F lu g e l: “ Psychological A spects o f M oral a n d Social P ro gress” (P ap e rs in co m m en t b y D r. K a rl M annheim a n d D r. R . H . Thouless). Tuesday, September 26 B r i t i s h S o c i e t y f o r I n t e r n a t i o n a l B ib l i o g r a p h y ( a t th e In s titu tio n o f E lectrical E ngineers, Savoy P la c e , V icto ria E m b an k m e n t, L ondon, W .C.2), a t 2.30 p.m .— D r. S . C. B ra d fo rd : “ Some G eneral Principles o f B ibliographical C lassification, w ith a p p lic atio n to th e U niversal D ecim al C lassification’* ; Mr. C. L. G ilb ert a n d Mr. C. G. G r a y : “ T he C lassification o f L ite r a tu r e in th e T echnical D e p a rtm e n t o f a n Oil C om pany” . R o y a l P h o t o g r a p h ic S o c i e t y ( S c i e n t i f i c a n d T e c h n i c a l G r o u p ) ( a t 16 P rinces G a te , S o u th K en sin g to n , L o n d o n , S.W .7), a t 6 p .m .— M r. T . T h o m e B a k e r : “ S o m e Uses o f D ried E m ulsions in P h o to g raphic In d u s trie s ” , w ith a D em o n stratio n o f Silk Screen P rin tin g . Wednesday, September 27 I n s t i t u t e o f F u e l ( a t th e In s titu tio n o f M echanical E ngineers, S to re y ’s G a te , S t. J a m e s ’s P a rk , L ondon, S .W .l), a t 2.30 p.m .—Mr. L. C . S o u th c o tt a n d M r. D . W . R udorff : “ S u p erh eaters fo r W a te r T u b e B oilers” . Friday, September 29 B io c h e m ic a l S o c i e t y (in th e D e p a rtm e n t o f B iochem istry, The U n iv e rsity , W este rn B a n k , Sheffield), a t 11 a .m .— T he 236th M eetin g . R o y a l I n s t i t u t e o f C h e m i s t r y ( j o i n t m e e t i n g o f t h e B ir m i n g h a m a n d M i d l a n d s S e c t i o n w i t h t h e I n s t i t u t e o f P h y s i c s ) ( in t h e C o n n a u g h t R o o m , I m p e r i a l H o t e l , B i r m i n g h a m ) , a t 6.30 p . m . — D r . G. W . S c o tt- B la ir : “ R h e o lo g y o f P la s tic s ; S tr e s s - s tr a in - tim e R e la tio n s fo r H i g h Polym ers a n d S im ilar M ate rials” . APPOINTMENTS VACANT A p p l i c a t i o n s a re in v ite d fo r th e following a p p o in tm e n ts on o r before th e d a te s m en tio n ed : D e p u t y C h i e f E n g i n e e r — T he B orough E lec tric a l E n g in ee r a n d M anager, G uildhall, Sw ansea (S ep tem b er 28). L e c t u r e r (full-tim e) i n P h y s ic s — The P rin cip al, R o y al T echnical College, Salford (S ep tem b er 29). C h e m i s t to th e Tees V alley W a te r B o ard — T he E n g in eer a n d G eneral M anager, W a te r B oard Offices, C orp o ratio n R o a d , M iddles brough (endorsed ‘C h em ist’) (S ep tem b er 29). S p e e c h T h e r a p i s t — T he D ire c to r o f E d u c a tio n , Shire H a ll, N o ttin g h a m (S ep te m b e r 30). G r a d u a t e A s s i s t a n t M a s t e r i n E n g i n e e r i n g — T h e P rin cip al, S o u th D o rset T echnical College, N ew stead R o a d , W ey m o u th (S ep tem b e r 30). S p e e c h T h e r a p i s t —-The D ire c to r o f E d u c a tio n , S ta n le y Buildings, C aunce S tr e e t, B lackpool (S ep tem b er 30). C h a i r o f P h y s io l o g y in th e U n iv ersity o f Ceylon— T he S ecretary , U n iversities B u re au o f th e B ritish E m p ire, c/o U n iv ersity College, G ow er S tr e e t, L ondon, W .C .l (S ep te m b e r 30). C h a i r o f E l e c t r i c a l E n g i n e e r i n g — T he A c tin g R e g istra r, The U niv ersity , Leeds 2 (S ep te m b e r 30). C h a i r o f B io l o g y in V icto ria U n iv e rsity C o lle g e , W ellin g to n , N e w Z ealand— T he S e c re ta ry , U niversities B u reau o f th e B ritish E m p ire, c/o U n iv ersity College, G ower S tr e e t, L ondon, W .C .l (S ep tem b er 30). P r i n c i p a l o f t h e H a c k n e y T e c h n ic a l I n s t i t u t e , a n d P r i n c i p a l o f t h e S o u t h - E a s t L o n d o n T e c h n i c a l I n s t i t u t e — T h e E d u c a tio n Officer ( T . l ) , C ounty H a ll, W e stm in ste r B ridge, L ondon, S .E .l (S ep te m b e r 30). P r i n c i p a l o f t h e W a l k e r T e c h n i c a l C o l l e g e , O ak en g ates— T he S e c re ta ry fo r E d u c a tio n , C o u n ty B uildings, Shrew sbury, Shropshire (S ep te m b e r 30). T e c h n i c a l A s s i s t a n t f o r L a b o r a t o r y a tta c h e d to Engineering F irm (N .W . L ondon d is tric t)— T he M in istry o f L a b o u r a n d N a tio n a l Service, R oom 432, A lex an d ra H o u se, K ingsw ay, L o n d o n , W .C.2 (q u o tin g R eferen ce No. C.2278.XA) (O cto b er 2). P h y s i c i s t o r E n g i n e e r , B.Sc. G rad e, fo r scientific in s tru m e n t develo p m en t w ork (O xford are a)— The M inistry o f L a b o u r a n d N a tio n a l S ervice, R oom 432, A le x an d ra H o u se, K ingsw ay, L o n d o n , W .C.2 (q u o tin g R eference N o. A.584.XA) (O cto b er 2). E n g i n e e r a n d G e n e r a l M a n a g e r to th e New Z ealan d H u t t V alley E lec tric Pow er B oard— T he M in istry o f L a b o u r a n d N a tio n a l Service, R oom 432, A lex an d ra H o u se, K ingsw ay, L o n d o n , W .C.2 (q u o tin g R eference N o. D.931.A ) (O cto b er 7). E x a m i n i n g O f f i c e r s (te m p o rary ) i n t h e P a t e n t s O f f i c e (c a n d id a te s should have a U n iv ersity D egree (or e q u iv a len t) in Science or Technology w ith C h em istry a s a su b ject)— T he M in istry o f L a b o u r a n d N a tio n a l Service, R oom 432, A lex an d ra H o u se, K ingsw ay, L o n d o n , W .C.2 (q u o tin g R eference N o. F.2982.A ) (O cto b er 9). P r o f e s s o r o f P h y s i c s — T he R eg istra r, U n iv ersity College, Single to n P a rk , Sw ansea (O cto b er 18). H o n o u r s G r a d u a t e i n C h e m i s t r y (L ondon, R eferen c e N o. F.2719.X A ), H o n o u r s G r a d u a t e s (2) i n M e t a l l u r g y (N e a th , R eference No. F.2720.X A ; Shipley, R eferen ce No. F.2721.X A ), a n d H o n o u r s G r a d u a t e i n C h e m i s t r y o r M em ber o f th e R o y a l I n s titu te o f C hem istry , B ra n ch E (L ondon, R eference N o. F.2722.X A ), on th e research staff o f a progressive N a tio n a l O rganization w ith hom e a n d overseas in te re sts—-The M inistry o f L a b o u r a n d N a tio n a l Service, R oom 432, A lex an d ra H ouse, K ingsw ay, L ondon, W .C.2 (q u o tin g th e a p p ro p ria te R eference N o.) (O cto b er 21). URE S e p t e m b e r 23, 1944, v o l. 154 Q u a l i f i e d C h e m i s t w ith som e research a n d in d u stria l experience, b y a progressive concern in th e Spen V alley d is tric t o f Y orkshire— T he M inistry o f L a b o u r a n d N a tio n a l Service, R oom 432, A lexandra H o u se, K ingsw ay, L ondon, W .C.2 (quo tin g R eference No. F.1737.X A ) (O ctober 27). L ib r a r i a n — T h e L ib ra ria n , Q ueen’s U n iversity, B elfa st (O ctober 31). C h a i r o f P s y c h o l o g y in th e U n iversity o f Sydney—-The S ecretary, U niversities B u re au o f th e B ritish E m p ire , c/o U n iversity College, G ow er S tr e e t, L ondon, W .C .l (O ctober 31). B e y e r C h a ir o f E n g in e e r in g ^ ^ R eg istra r, T he U niversity, M an ch ester 13 (N ovem ber 18). P r o f e s s o r s h i p o f N a v a l A r c h i t e c t u r e , te n a b le a t K ing’s College, N ew castle-upon-T yne— T he A cting R eg istrar, U n iversity Offices, 40 N o rth B ailey, D u rh a m (N ovem ber 30). F e l l o w s h i p a n d T u t o r s h i p i n M a t h e m a t ic s — T he S enior T u to r, J e su s College, O xford (D ecem ber 1). S p e e c h T h e r a p i s t — T he D ire c to r o f E d u c a tio n , E d u c a tio n Office, R o th e rh a m . L e c t u r e r (w om an, te m p o ra ry ) i n P s y c h o l o g y a n d P r i n c i p l e s o f E d u c a t io n in th e G lam organ T raining College, B arry — The D irector o f E d u c a tio n , G lam organ C ounty H a ll, Cardiff. L e c t u r e r (fu ll-tim e, te m p o ra ry , m a n o r w om an) i n B io l o g y in t h e L eeds College o f T echnology— T he D ire c to r o f E d u c a tio n , E d u c a tio n Offices, L eeds 1. A s s is t a n t H e a d o f t h e D e p a r t m e n t o f E l e c t r ic a l E n g in e e r in g — T he P rin cip al, B irm ingham C e n tra l T echnical College, Suffolk S tre e t, B irm ingham 1. A g r i c u l t u r a l E n g i n e e r (for L ondon), w ith p ra c tic a l know ledge o f D ra in a g e a n d Irrig a tio n —T h e M inistry o f L a b o u r a n d N a tio n a l Service, A p p o in tm e n ts D e p a rtm e n t, S ardinia S tr e e t, K ingsw ay, L o n d o n , W .C.2 (q u o tin g R eference N o. R.S.70). C h a i r o f O b s t e t r i c s a n d G y n a e c o l o g y in th e R o y a l F a c u l t y o f M edicine, B ag h d a d , I r a q —A p p o in tm e n ts D e p a rtm e n t,B ritis h C o u n c il, 3 H a n o v e r S tr e e t, L ondon, W .l. S pec ia list (for L ondon), w ith g e n eral a ll-round know ledge o f F ood Processing o f M ilk, D a iry P ro d u c ts , M ea t, V egetable F a ts an d O ils, F ish , e tc .— T he M inistry o f L a b o u r a n d N a tio n a l Service, A p p o in tm e n ts D e p a rtm e n t, S ardinia S tr e e t, K ingsw ay, L ondon, W .C.2 (q u o tin g R eference No. R .S.66). L e c t u r e r (fu ll-tim e , te m p o ra ry ) i n t h e D e p a r t m e n t o f E l e c t r ic a l E n g i n e e r i n ( j— T he P rin cip al, B orough P oly tech n ic, B orough R o a d , L on d o n , S .E .l. P a p e r M i l l E n g i n e e r fo r B en g al, w ith p ra c tic a l P a p e r Mill ex perien ce, cap ab le u ltim a te ly o f ta k in g charge o f a ll P aperm aking P la n t M aintenance— T he M inistry o f L a b o u r a n d N a tio n a l Service, A p p o in tm e n ts D e p a rtm e n t, Sardinia S tr e e t, K ingsw ay, London, W .C.2 (quo tin g R eference N o. O.S.228). A s s i s t a n t L e c t u r e r i n A g r i c u l t u r a l Z o o l o g y — T h e P rin cip al, H a rp e r A dam s A g ric u ltu ral College, N ew port, Shropshire. S e c o n d V e t e r i n a r y O f f i c e r , Im p erial B ureau o f A nim al H e a lth , W eybridge— T he Secretary, Im p e rial A gricultural B ureaux, 2 Queen A nne’s G a te B uildings, L ondon, S .W .l. REPORTS and other PUBLICATIONS (not includedlin the m onthly Books Supplem ent) Great Britain and Ireland S c o ttish S ociety for R esearch in P lan t-B reed in g . R e p o rt (abridged) b y th e D irecto rs a n d R e p o rt b y th e D ire c to r o f R esearch to th e A n n u al G en eral M eeting, 2 0 th J u ly 1944. P p . 34. (E dinburgh : S c o ttish Society fo r R esearch in P lant-B reeding.) [49 T ory R eform C om m ittee. B u lle tin N o. 4 : G overnm ent Policy for th e R ebuilding o f U rb a n A reas. P p . 20. (L ondon : T ory R eform C om m ittee.) [49 M edical R esearch C ouncil: In d u s tria l H e a lth R esearch B oard. R e p o rt N o. 8 5 : T h e R ecording o f Sickness A bsence in In d u stry . (A P relim in ary R e p o rt.) B y a Sub-C om m ittee o f th e In d u stria l H e a lth R esearch B oard. P p . 18. (L o n d o n : H .M . S ta tio n e ry Office.) 4d. n e t. [59 T ran sa ctio n s o f th e R o y a l S ociety o f E dinburgh. V ol. 61, P a r t 1, No. 7 : C ytological a n d G en etical S tudies in th e G enus Solanum , 2, W ild a n d N a tiv e C u ltiv a te d ‘D iploid’ P o ta to e s . B y D r. H . C. Choudh u ri. P p . 199-219 + 1 p la te . (E dinburgh a n d L o n d o n : O liver an d B oyd.) 5s. 9d. [79 B ritish S ta n d a rd Conversion F a c to rs a n d T ables. (B .S. 350 : 1944.) P p . 96. (L o n d o n : B ritisn S ta n d a rd s In s titu tio n .) 3s. Qd. n e t. [129 O ther Countries T rin id ad a n d Tobago : F o re s t D e p a rtm e n t. 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