572 



NATURE 



[July i, 1920 



The Cambridge British Flora. By Prof. C. E. Moss. 

 Assisted by specialists in certain genera. Vol. iii. 

 Pp. xvi + 200; plates, pp. vi+191. (Cambridge: At 

 the University Press.) Two parts. 6i. 15s. net ; 

 2 parts in i vol., 7Z. net. 



Memoirs of the Geological Survey. The Geology 

 of Anglesey. Vol. i. Pp. xl + 388+xxvi plates. 

 Vol. ii. Pp. 389-980 + plates xxvi B-ix+ folding plates. 

 By E. Greenly. (Southampton : Ordnance Survey 

 Office; London: E. Stanford, Ltd.) 2 vols., 3Z. 3s. 

 net. 



The Arithmetic of the Decimal System. By Dr. J. 

 Cusack. Pp. xvi + 492. With Answers. (London: 

 Macmillan and Co., Ltd.) 6.?. 



Medical Research Council and Department of 

 Scientific and Industrial Research. Reports of the 

 Industrial Fatigue Research Board. No. 7 : Indi- 

 vidual Differences in Output in the Cotton Industrv. 

 (Textile Series, No. i.) Pp. iii+13. (London: H.M. 

 Stationery Office.) 6d. net. 



Les Revelations du Dessin et de la Photographie h. 

 la Guerre : Principes de M^trographie. By Lt.-Col. 

 Andrieu. Pp. xiii+112. (Paris: Gauthier-Villars et 

 Cie.) 8 francs. 



Elements of Radio- telegraphy. Bv Lieut. E. W. 

 Stone. Pp. vii+267 + xxxiii plates. (London : Crosby 

 Lockwood and Son.) 165. 6d. net. 



Grasses and Rushes, and How to Idpntifv Them. 

 Bv J. H. Crabtree. Pp. 64. (London : The Epworth 

 Press.) IS. 9d. net. 



Space, Time, and Gravitation : An Outline of the 

 General Relativity Theory. By Prof. A. S. Edding- 

 ton. Pp. vii + 218. (Cambridge: At the University 

 Press.) 15s. net. 



Pasteur : The History of a Mind. By Prof. E. 

 Duclaux. Translated by E. F. Smith and F. Hedges. 

 Pp. xxxii + 363. (Philadelphia and London : W. B, 

 Saunders Co.) 21s. net. 



The Journal of the Institute of Metals. Edited bv 

 G. Shaw Scott. Vol. xxiii. No. i, 1920. Po. xii + 

 644 + xxx plates. (London : Institute of Metals.) 

 31S. 6i. net. 



A Historv of English Philosophv. By Prof. W. R. 

 Sorley. Pp. xvi+380. (Cambridge : At the Uni- 

 versity Press.) 20S. net. 



The Mystery of Life as Interpreted bv Science. Bv 

 R. D. Tavlor. Pp. 176. (London and Felling-on- 

 Tyne : Walter Scott Publishing Co., Ltd.) 3s. 6d. 

 net. 



Applied Eugenics. By P. Popenoe and Prof. R. H. 

 Johnson. (Social Science Text-Books. 1 Po. xii + ACq. 

 (New York : The Macmillan Co. ; London : Macmillan 

 and Co., Ltd.) 14-^. net. 



Air Ministry. Meteorolpgical Office, London. Pro- 

 fessional Notes, No. 8. Temperatures and Humidities 

 in the Upper Air : Conditions Favourable for 

 Thunderstorm Development, and Temperatures over 

 Land and Sea. Bv Capt. C. K. M. Douglas. 

 Pp. 110-139. (London : Meteorological Office, Air 

 Ministrv.) 2s. net. 



Air Ministry. Meteorological Office. Geophysical 

 Memoirs, No. 16. Aids to Forecasting : Types of 

 Pressure Distribution. With notes and tables for the 

 fourteen years IQ05-18. Bv E. Gold. Pp. 147-74. 

 (London : Meteorological Office, Air Ministry.) 2s. 6d. 

 net. 



Notes on Chemical Research : An Account of Cer- 

 tain Conditions which Aoplv to Original Investiga- 

 tion. By W. P. Dreaper". (Text-Books of Chemical 

 Research and Engineering.) Second edition. Pp. xv+ 

 191:;. (London: T- and -A.. Churchill.) 7s. 6d. net. 



the Concept of Nature. By Prof. A. N. White- 

 head. (Tarner Lectures delivered in Trinity College, 

 November, T919.) Pp. 1x4-202. (Cambridge: At the 

 University Press.) 14.?. net. 



NO. 2644, VOL. 105] 



William Smith : His Maps and Memoirs. By T. 

 Sheppard. Pp. iii -f 75-253 + plates. (Hull: A. Brown 

 and Sons, Ltd.) 



Imp)erial Institute. Indian Trade Inquiry. Reports 

 on Oil-Seeds. Pp. ix-H49. (London: J. Murray.) 

 65. net. 



Conifers and their Characteristics. By C. Coltman- 

 Rogers. Pp. xiii + 333. (London : J. Murray.) 21s. 

 net. 



The Small Farm and its Management. By Prof. J. 

 Long. Second edition. Pp. 328. (London : J. 

 Murray.) 75. 6d. net. 



.Anniversaries and other Poems. By L. Huxley. 

 Pp. x + 82. (London: J. Murray.) 5s. net. 



Diary of Societies. 



MONDAY, July 5. 

 RovAL Institution of Great Britain, at 5. — General Meeting. 

 Aristotklian Society fat 74 Grosvenor Street), at 8. — Rev. Dr. W. F. 

 Geikie Cobb : Mysticism, True and False. 



WEDNESDAY, July 7. 

 Institution of Petroleum Technologist"! fin Canada Buildine, Crystal 



Palace), at 6.— E. H. Cunningham Craig : Wild Catting (Free Illustrated 



Lecture). 



SATURDAY, July 10. 

 Physiological Society (at Physiological Laboratory, University, Oxford)i 



at 4.— J. B. Leathes and H. C. Broadhurst : Excretion of Phosphate.— 



J. Barcroft and F. J Roughton: Diffusion Co-efficient of Lung.— S. P. L. 



S<^rensen and R. J. Cohn : Solubility of Globulin.— A. Krogh : Reaction 



of Blcod Vessels to Local Stimuli. 



CONTENTS. PAGE 



Medical Research and the Practitioner 541 



Theory of Dioptric Instruments. By A. E. C. . . 542 



The International Research Council 543 



Problems of Population. By E. B 543 



The Elements of Hardy Fruit Culture S^S^ 



Our Bookshelf 545 



Letters to the Editor:— 



The Constitution of the Elements.— Dr. F. W. 



Aston 547 



Applied Science and Industrial Research.— Major 



A. G. Church 547 



Science and Scholasticism. — Prof. Jas. J. Walsh ; 



Dr. Charles Singer 547 



Commercial Parasitism in the Cotton Industry.— 



O. F. Cook 548 



Fuel Research. By Prof. John W. Cobb 550 



Use of Sumner Lines in Navigation. {With 



Diagrams.) By Capt. T. H. Tizard, C.B., F.R.S. 552 

 Obituary : — 



.. Dr. F. A. Tarleton.— R. A. P. Rogers 554 



Notes 556 



Our Astronomical Column : — 



Tempel's Second Periodic Comet . 560 



Denning's Comet of 1 881 and a Meteoric Shower . . 560 



Capture Orbits • 5^° 



Education in the New Era. By Prof. Frederick 



Soddy, F.R.S 561 



British Aeronautics 561 



Climatic Cycles and Tree-growth. By W. W. B. . 562 

 The Interferometer in Physical Measurements. 



By L. CM. 563 



Canvas-destroying Fungi. By J. Ramsbottbm . . 5*13 



The Economic Pursuits of the Trobriand Islanders 564 



The Organisation of Scientific Work in India . . 565 



University and Educational Intelligence • • • • 5^8 



Societies and Academies 569 



Books Received 57' 



Diary of Societies 572 



