444 



NATURE 



[June 3, 1920 



Comstock. Part i. Second edition. Pp. xviii+220. 

 (Ithaca, N.Y. : The Comstock Publishing Co.) 

 2.50 dollars net. ^ 



Plant Indicators : The Relation of Plant Com- 

 munities to Process and Practice. By F. E. Clements. 

 Pp. xvi + 388 + 92 plates. (Washington: Carnegie 

 Institution of Washington.) 



Carnegie Institution of Washington. Year Book 

 No. 18, 1919. Pp. xvi + 380 + plate. (Washington: 

 Carnegie Institution of Washington.) 



Egyptological Researches. Vol. iii. By W. Max 

 Miiller. Pp. 88 + 40 plates. (Washington : Carnegie 

 Institution of Washington.) 



Elementary Agricultural Che;nistry. By H. Ingle. 

 Third edition. Pp. ix + 250. (London : C. Griffin and 

 Co., Ltd.) 55. 



Diary of Societies. 



THURSDAY, June 3. 



Institution of Gas Engineers (at Institution of Mechanical Engineers), 

 at 10 a.m. — Society of British Gas Industries : Carbonisation. — H. J. 

 Hodsman and Prof. J.W. Cobb : Oxygen in Gas Production. — J. Fisher : 

 Electricity Supply by Gas Companies.— G. Warburton : Contemplations 

 on the Report of the Fuel Research Board. 



Royal Horticultural Society (at Royal Gardens, Chelsea), at 3. — 

 Capt. H. J. Page : Green Manuring — Its Possibilities in Horticulture. 



Royal Institution of Great Britain, at 3. — William Archor : Dreams 

 with Special Reference to Psycho-Analysis. 



Royal Society, at 4.30.— Sir Ernest Rutherford : The Nuclear Constitu- 

 tion of the Atom (Rakerian Lecture). 



Linnean Society of London, at 5.— R. Swainson-Hall : Exhibition of 

 50 Drawings of the Oil- Palm, Elaeis guine'nsis. — A. Whitehead : Objects 

 Observed near Basra during the War. — Prof. W. J. Dakin : Whaling in 

 the Southern Ocean. — Dr. R. R. Gates : Demonstration of Chromosomes 

 in the Pollen Development of Lettuce. 



Chemical Society, at 8.-M. O. Forster and W. B. Saville : Studies in 

 the Camphane Series. Part XXXVIIt. The Cyanohydrazone of 

 Camphorquinone. — R. G. Fargher : Arsenic Acids derived from Guaiacol 

 and Veratrole. — G. T. Morgan and D. C. Vining: Diphenylarsenious 

 Chloride and Cyanide. (Diphenylchloroarsine and Diphenylcyanoarsine.) 

 — F. Challenger and A. E. G<5ddard : Organo-derivatives of Bismuth. 

 Part III. The Preparation of Derivatives of Quinquevalent Bismuth. — 

 J. N. Ray: Modification and Extension of Friedel-Crafts' Reaction. 

 Part I, — F. Arnall : The Determination of the Relative Strengths of some 

 Nitrogen Bases of the Aromatic Series and of some Alkaloids. — T. C. 

 Gho^h : ''he Electrical Conductivity of Pure Salts in the Solid and Fu«ed 

 States; Determination of the Activity Coefficients of Ions in Solid Salts. 

 — W. J. Sanderson and W. J. Jones: Anethole as Solvent in the Cryo- 

 scopic Method of Determining Molecular Weight. 



Royal Socifty of Medicine (Obstetrics and Gynaecology Section), at 

 8. — Dr. P. Turner : Traumatic Rupture of the Pedicle of a Sub-Perito- 

 neal Fibroid. — Dr. F. Anders'^n : A Case of Rupture of the Uterus. — Dr. 



F. Shaw and Dr. Burrowes : Radical Cure of Advanced Carcinoma of the 

 Cervix, made Possible by the Application of Radium.— G. Ley: The 

 Pathology of Accidental Haemorrhage. 



FRIDA y, Junk 4. 

 Association of Economic Biologists and Imperial Entomological 



CoNGRES.s. — Joint Meeting (at the Rothamsted Experiment Station), 



St. Pancras Station to a.m. train. 

 Royal Society of Arts (Indian and Colonial Sections, Joint Meeting), 



at 4.30. — Prof. Sir John Cadman: The Oil Resources of the British 



Empire. 

 Royal Institution of Great Britain, at 9. — Sir Ronald Ross: Science 



and Poetry. 



SATURDAY, June 5. 

 Royal Institution of Great Britain, at 3.— Dr. J. H. Jeans : The 



Theory of Quanta. 



MONDAY, June 7. 

 Institute of Actuaries, at 5. — (Annual General Meeting.) 

 •^OYAL Institution of Great Britain, at 5.— (General^ Meeting.) 

 Society of Chemical Industry (at Institute of Chemistry), at 8. — 



Informal Meeting.) 

 Royal Institute of British Architects, at 8. — (Election of Council.) 

 Royal Society of Arts, at 8. — Dr. W. Rosenhain : Aluminium and its 



Alloys (Cantor Lecture.) 

 Royal Geographical Society (at MoVian Hall), at 8.30.— Prof. G. A. F. 



Molengraff: Ocean Research in the Dutch East Indies. 

 TUESDAY, June 8. 

 Royal Photographic Society of Great Britain, at 7. — Dr. W. H. 



Mills and Sir Wm. J. Pope : Studies on Photographic Sensitisers. 



Part II. (Sensitisers of the Type of Pinacyanol or Sensitol Red.) — 



G. I. Higson : A Simple Form of Non-intermittent Exposure Machine. — 

 Mr. Offer : Examples of Photographs in Colour taken during Theatrical 

 Performances.— (Lectures under the Control of the Scientific and 

 Technical Group.) 



IVEDNESDA V, June 9. 

 Geological Society of London, at 5.30. — Dr. C. G. Knott : Earthquake 



Waves and the Elasticity of the Earth. 

 Institution of Electrical Engineers (Wireless Section) fat Institution 



of Mechanical Enginfers), at 6.— M. Latour : Hieh Frequency Macnines. 

 British Psychological Society (Education Section) (at College of 

 •■.Preceptors), at 6. — W. H. Winch: Equal Additions versus Decom- 

 ' position in Teaching Subtraction : An Experimental Research. 



NO. 2640, VOL. 105] 



THURSDAY, June 10. 



Institution of Mining ENGiNEERs(at Geological Society), from 11 a.m. t© 

 5. — (Genera! Meeting. )~Prof. H. Louis: Compensation for Subsidences- 

 — W. Maurice : The Fleissner Singing-flame l,amp.— W. Maurice : The 

 Wolf-Pokorny and Wiede Acetylene Safety-lamps.- G. Oldham: The 

 "Oldham" Cap Type Miner's Electric Safety-lamp.— Discussion on 

 First Report of the Committee on " The Control of Atmospheric Conditions 



' in 'Hot aiid Deep Mines."— D. S. Newey : A New Method of Working 

 Thiiqk Seams of Goal at Baggeridge Colliery.— T. G. Bocking : Protractors. 

 — T. G. Bocking: Magnetic . Meridian Observations; A Method of 

 Utilising the Kew Ob-ervatory "Records. 



RovAL Society, av ^.^a.—Prota/'le /"rt/^-^j.— A. V. Hill and W. Hartree : 

 The Thermo-Elastic Properties of Muscle.— Sir James Dobbie and J. J. 

 Fox : The Absorption of Light by Elements in the State of Vapour : 

 (i) Selenium and Tellurium; (2) Mercury, Cadmium, Zinc, Phosphorus, 

 Arsenic, Antimony. — H. G. Cannon : Production and Transmission of an 

 Environmental Effect in Sivtocephalns vetulus.— Y.. C. Grey: The 

 Enzymes of 5. coli communis which are Concerned in the Decomposition 

 of Glucose and Mannitol. Part IV. The Fermentation of Gluco.se in the 

 Presence of Forinic Acid. — L. T. Hogben : Studies on Synapsis. II. 

 Parallel Conjugation and the Prophase Complex in Periplaneta, with 

 Special Reference to the Premeiotic Telophase. 



London Mathematical Society, at 5. 



Royal Coi lege of Physicians of London, at 5. — Dr. A. F. Hur.st: 

 The Psychology of the Special Senses and their Hysterical Disorders 

 (Croonian Lecture). 



Optical Society, at 7.30.— Miss A. B. Dale: Accuracy of Setting. - 

 Dr. J. S. Anderson : A New Method of Immersion Refractometry. 



Institute of Metals (at Institution of Mechanical Engineers), at 8. — 

 Prof. C. A. F. Benedicks : The Recent Progress in Thermo-Electricitjr 

 (Annual May Lecture). 



FRIDAY, June ii. 



Institution of Mining Engineers (at Geological Society), from xi a.m. 

 to 5. 



Royal Astronomical Society, at 5. 



Physical Society of London, at 5.— Dr. T. Barratt and A. J. Scott : 

 Radiation and Convection from Heated Surfaces. — J. S. G. Thomas : 

 An Electrical Hot-Wire Inclinometer. — L. F. Richardson : Convective 

 Cooling and the Theory of Dimensions.— J. W. T. Walsh : The Radiation 

 from a Perfectly Diffusing Circular Disc. 



CONTENTS. PAGE 



Present State of the Dye Industry 413 



Poetry and Medicine. By Prof. D'Arcy W. 



Thompson, C.B, , F.R.S 414 



Movements of Plants. By V. H. B 416 



Applications of Electricity. By Dr. A. Russell . 418 



British Iron Ores. By Prof. H. Louis 419 



Our Bookshelf 420 



Letters to the Editor:— 



The Flight of Flying-fish.— Dr. J. McNamara . . 421 

 An Experiment on the Spectrum. — Dr. R. A. 



Houstoun 421 



Anti-Gas Fans. — Mrs. Hertha Ayrton ...... 422 



A New Method for Approximate Evaluation of 

 Definite Integrals between Finite Limits. — C. F, 



Merchant 422 



Applied Science and Industrial Research. — Prof. 



Frederick Soddy, F. R. S. ; Major A. G. Church 422 

 The Great Red Spot on Jupiter. ( With Diagram.)— 



W. F. Denning 423 



British and Foreign Scientific Apparatus. — ^J. W. 



Ogilvy ; J. S. Dunkerly 424 



Cost of Scientific Publications.— Dr. C. G. Knott . 425 



Natural History Studies in Canada. (Illustrated.) . 426 



Tidal Power. (l^it/t Diagra?ns.) 427 



Obituary : — 



Prof. C. A. Timiriazeff, For.Mem.R.S 430 



Notes 431 



Our Astronomical Column : — 



Return of Tempel's Comet 436 



Double Stars . 436 



Diffraction Image of a Disc 436 



Monument to Charles Gerhardt. By Sir T. E. 



Thorpe, C.B., F.R.S 436 



Biological Papers from Bengal 436 



Attainment of High Levels in the Atmosphere . 437 

 Physical Problems in Soil Cultivation. By B. A. 



Keen 438 



The Anornaly of the Nickel Iron Alloys : Its Causes 



and its Applications .... 438 



Technical Education and Mind Training .... 439 



University and Educational Intelligence 439 



Societies and Acaoen.ies 441 



Books Received 443 



Diary of Societies 444 



