348 



NATURE 



[November 27, 1919 



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F. St. Mars. Pp. vii-l- 

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Tin Ores. By G. .M. Davies. 

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Snapshots of the Wild. 

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Manual of Meteorology B\ Sir Napier Shaw. 

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Examples in Heat and Heat Engines. By T. Peel. 

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Justice and the Poor. By R. H. Smith. Pp. xiv-t- 

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.\ Naturalist's Sketch Book. By A. Thorburn. 

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Zinc and its .Alloys. Bv Dr. T. E. Lones. Pp. ix-(- 

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The Transmutation of Bacteria. By Dr. S. Gurney- 

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Opere di EvangeHsta Torricelli. Edited by G. Loria 

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 Pp. 521. (Faenza : G. Montanari.) 60 franchi the 

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.-\nimal Life under Water. By Dr. F. 

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DIARY OF SOCIETIES. 



THURSDAY, November 27. 

 ROVAL Cou.KGE OF SuRGEONS, at 3.— Annual Meeting of Fellows and 



Members. 

 Institution of ELECTRrcAi.Evr,iNEERs(at In..titution of Civil Kngineers). 



at 6.-C. C. Paterson, f. W. T. Walsh, A. K. Taylor, and \V. Harnett : 



Carbon Arcs for Searchlights. 



FRIDAY, November 28. 

 RoYAi. Society of Medicine (Study of Di.iease in Children Section), 



at 4.-^o.— Dr. E. Pritchard : (i) Hypertrophy of Pylorus with other 



Associated Hypertrophies ; (2) Hypertrophy of Lower End of (Esophagus 



with Papilloma of CarHia. 

 Physical Sociktv, at 5.— Discussion on Lubrication. To be opened by 



Dr. T. E. Stanton. Speakers include Principal Skinner, W. R. Hardy, 



F. W. Manchester, and H. M. Martin. Visitors are invited to this 



Meeting. 

 Royal Socety of Med'ctnk (Epidemioloijy and Stat** Medicine Section), 



at 8.30.— Col. W. Hunter : The Epidemiology of Typhus Fever in Serbia. 

 MONDAY, Decemiskr i. 

 Royal Society, at 4.— Anniversary Meeting. 

 Royal Ik.stitution, at 5.— General Meeting of Members. 

 Society of Engineers (at Geological Society), at 5,3a.— Capt. K. 



Twelvetrees : Mechanical transport in the War. 

 Aristotelian Society (at 22 Albemarle Street, W.i), at 8.— G. Cater: 



The Nature of Inference. 

 RoYAL_ Institute of Bhitish Architects (Members* Meeting), at 8.— 



Archit'-cts* Fees for Housing Schemes. 

 Royal Society of Art-, at 8.— Dr. J. T. Hewitt: Synthetic Drugs 



(Cantor I.eclure). 

 Society of Chemical Industry (at Chemical Societv). ai 8. — A. Hennine : 



Ethyl Chloride.— C. E. Barrs : The Influence of Impurities in Lead 



when it is Heated with Concentrated Sulphuric Acid. 

 Royal Geographical Society (at ^ol'an Ha'l), at 8.^0.— H. Wilson 



Fox : Development of Transport on the Great I^kes of Africa. 



TUESDAY, Decemcep* 2. 

 Royal Horticultural Society (at Vincent Square), at 3. 

 Institutiow of Civil Engineers, at 5.30. 



RoNTGEN SociETv (at Mt-dical Socieiy of LonHon), at 8.15.— Dr. F.. Taylor 

 Jones : The Action of Induction Cods —Major Cooper : Description and 



NO. 2613, VOL. 104] 



Demonstration of New High-speed Interrupter for Induction Apparati:& 



and Krimandeau Coils. 



WEDNESDAY, December 3. 

 Royal United Service Institution, at 3.— Air Commodore H. R, 



Brooke-Popham : The Air Force. 

 Royal Society of Arts, at 4.30.— J. W. Pearson : T'hc Oii Seed 



Crushing Industry. 

 Royal College of Surgeons, at 5.— Sir John Tweedy : The Surgical 



Tradition (Thomas Vicary Lecture). 

 Geological Society, at 5.30. 

 Institution of Automobh e Engineers (at Institution of Mechanical 



Engineers), at 8.— E. N. Duffield : Car Design and Car Usage from the 



Point of View of the Majority of Owner Drivers. 

 Society of Public Analysts and Other Analytical Chemists (at 



Chemical Society), at 8.— G.van B. Gilmour : New Distillation Method 



for Detecting Aduheration in Butter and for Estimating Kais of the 



Coconut Group.— F. S. Sinnatt and L. Slater: An Investigation into 



the Composition of the Unsaturated Hydrocarbons Present in Coal Gas. 



— H. S- Evans : A New Process for the Determmation of Arsenic ; » ith 



Notes on the Chemistry of the Marsh- Berzelius Process. 



THURSDAV. December 4. 



Royal Society, at ^.-^i^:— Probable Papers.— h. M. Williams: (i) Ihe 

 Adsorption of Gases at Low and Moderate Concentrations : Part I. 

 Deduction of the Theoretical Ad^orptio^ Isotere and Isotherm ; Part IL 

 Experimental Verification of the Form of the Theoretical Isatere-; and 

 Isotherms. (2) The Adsorption of Gases at Low and Moderate Concen- 

 trations : Part IlL Experimental Verification of the Constant in the 

 Theoretical Adsorption Isotere.— T. K. Merton : (i) The Secondary 

 Spectrum of Hydrogen ; (2) The Spectra of Isotopes.— E. F. Armstrong 

 and 'J". P, Hilditch : A Study of Catalytic Actions at Solid Surfaces, 

 Part H.— F. Horton and Ann C. Davies: An Experimental Determiaa- 

 tion of the Critical Klectron Velociiies for the Produclicn of Radintion 

 and lonisation on Collision with Argon Atoms. 



Chemical Society, at 8. 



P'RIDAV, December 5. ' 



Institution of Electrical Engineers (StudentV Meeting) (at ihc 

 I iiy and Guilds Technical College. Leonard Sireet), at 7.— H M- 



' Barlow : Thermionic Magnifiers. 



Technical Insi'I£CTion Association (at Royal Society of Art.s), at i.t,o.— 

 R. D. Summerfieldand H.j. Davey : Inspection and Testing of Materials. 



CONTENTS. p.AGE 



The Royal Commission on the Universities of 



Oxford and Cambridge 329 



Principles of Radio-communication. By A. R. . . 330 



Round the Wrekin 331 



Our Bookshelf 33^ 



Letters to the Editor:— 



Holland and Inlern^tional Rivers. — Dr. P. Geyl 



and Pi of. L. ■J\i . Lyde 333 



The Colours of Racehorses.— Sir Wm. Ridgeway 334 



Gravitation and Liyht.— Sir Oliver Lodge, F. R.S. 334 

 Variation of Refractive Indices. — Sir Henry A. 



Miers, F.R.S 334 



Neon.— F. W. Aston ... 334 



Bird Migration.— Dr. Michael C. Grabbam . . 334 



Luminous Worms. — Rev. Hilderic Friend .... 334 

 The Doubly Refracting Structure of Silica Glass. — 



Robert W. Lawson 335 



The Antiquity of Man.— J. Reid Moir and Dr. A. 



Smith Woodward, F.R.S 335 



Western Turkestan. By S. Casson 335 



The British Association and Scientific Research . 337 



Dr. John Aitken, F.R.S. By C. G. K 337 



Notes 33* 



Our Astronomical Column : — 



'I he Leonid Meteoric Shower 342 



Two Stars with Large Parallaxes 34^ 



Aphelia of Planets and Comets 343- 



The British Science Exhibition, Glasgow ... .343 

 A New Astronomical Model. By Rev. A. L. 



Cortie, S.J 343 



University and Educational Intelligence .... 344 



Societies and Academies 345 



Books Received 347 



Diary of Societies 34*' 



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Advertisements and business letters to be addressed to the 

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Editorial Communications to the Editor. 

 Telegraphic Address: Phusis, London. 

 Telephone Number : Gerr.^rd 88}o. 



