284 



NATURE 



[April 29, 1920 



FRIDAY, April 30. 



Opmthai.moi.ogical Society ok the United Kingdom (at Royal Society 

 of Medicine), at 10 a.m. — Sir Archibald Garrod, R. Foster Moore, and 

 Others : Discussion on Diabetes in Relation to I )iseases of the Eye.— At 8.— 

 H. M. Traquair : Anatomically Separate Anterior Commissure at the 

 ("hiasma in a Case of Pituitary Tumour with Acromegaly. — Dr. G. 

 Holmes: Tumours Involving the Optic Nerves and Chiasma. — M. L. 

 Hine: Primary Epithelioma of the CUiary Body. — E. Clarke : A Further 

 Note on the Accommodation of the Eye.— H. Neame : Cysts of the 

 Retina — W. Wallace: A Glyptic Method for Representing Certain Con- 

 ditions of the Kundus in Disease. — A. W. Stirling: A Case of Melanoma 

 of the Iris. 



WiRELFSS Society of London (at Institution of Civil Engineers), at 6. — 

 Major B. Binyon : A Wireless " Call " Device. 



Institution of Electrical Engineers (Students' Meeting) (at Faiaday 

 House), at 7, — J. E. Holmstrom : Tidal Power. 



Institution of Mechanical Engineers (Informal Meeting), at 7. — 

 A. V. Bale and Others : Discussion on Suggested Means of Improving 

 and Increasing the Services of the Institution to Members. 



Royal Institution of Great Britain, at 9.— Prof. F. O. P.ower : The 

 Earliest-known Land Flora. 



SATURDAY, May i. 

 Ophthalmologicai. Society of the United Kingdom (at St. Margaret's 



Hospital, Leighton Road, Kenti>h Town), at 10 a.m.— Dr. G. Fitzgibbon, 



M. S. Mayoii, and Others : Discussion on the Prevention and Treatment 



of Ophthalmia Neonatorum. 

 Royal Institution of Great Britain, at 3. — Dr. F. Chamberlin : 



The Private Character of Queen Elizabeth.— At 5. — Annual Meeting. 



MONDAY, May 3. 

 Royal Insthution of Great Britain (General Meeting), at 5. 

 Surveyors' Institution (Junior Meeting) (Annual General Meeting), 



at 7. 

 Royal Institute of British Architects (Annual General Meeting), 



at 8.. 

 Royal Society of Arts, at 8.— A. T. Bolton : The Decoration and 



Architecture -of Robert Adam and Sir John Sloane, 1758-1837 (Cantor 



Lecture). 

 Society of Chemical Industry (at Chemical Society) (Annual Meeting). 



at 8. 

 R/iYAi. Geographical Society (at /Eolian Hall), at 8.30.— H. St. J. 



Philby ; Across Arabia : from the Persian Gulf to the Red Sea. 



TUESDAY, May 4. 

 Royal Institution of Great Britain, at 3. — Prof. A. Keith : British 



Ethnology : The Invaders of England. 

 RoYal Society of Med cine (Orthopaedics Sub-Section), at 5. — 



Anntial General Meeting. 

 Royal Photographic Society of Guf.at Britain (Technical Meeting), 



.It 7.— Dr. C. E. Kenneth Mees and L. A. Jones: The Theory of Tone 



Reproduction. 

 RiiNTGEN Society (at Medical Society of London), at 8.15. — Prof. S; Russ : 



Some Problems in the Action of Radiation upon Tissues. — Prof. A. O. 



Rankine : . The Transmission of Speech by Light. — Dr. H. A. Eccles : 



New Portable Viewing Lantern (Demonstration.s). 



WEDNESDA Y, May 5. 

 RovalSocietyof ARTsat 4.3o.-Dr. C. E. Kenneth Mees : A Photographic 



Research Laboratory. 

 Geological Society of London, at 5.30.— S. Hazz'edine Warren : A 



Natural " Eolith " Factory beneath the Thanet .^and. 

 KoYAL SociF.iY of MEDICINE (Surgery Section), at 5.30.— Annual 



General Meeting. 

 Society of Public Analysts and other Analytical Chemisis (at 



Chemicil Society', at 8. — C. A. Mitchell : Estimation of the Age of Ink 



in Writing. — E. R. Dovey: 1 he Estimation of Chinese Crude Camphor. — 



H. D. Richmond and L. R. Ellison: Studies in Steam Distillation, 



Part VII.: The Volatility of Isomers. 

 Institution of Automobile Engineers (at Institution of Mechanical 



I'^rigineers), at 8. — Major B. H. Thomas : The Electro-Deposition of Iron 



as applied to Motor Vthicle Repair Work. 



THURSDAY, May 6. 



Ikon and Steel Institute (at Institution of Civil Engineers) (General 

 Meeting), at to a.m.— Dr J. E. Stead : Inaugural Address. -r-E. H. 

 Lewis: Iron Portland Cement.— At 2.30. — F. Clements : British Blast- 

 P'urnace Practice. — H. E. Wright : Chemical and Thermal Cond tions in 

 Blast- Furnace Practice. — C. H. Ridsdale : The Valuation of Ores and 

 Iron-making Material. — J. A. Heskett: The Utilisation of 'J'itaniferous 

 Iron Ore in New Zealand. 



Royal Society of Medicine (Obstetrics and Gynsecology Section, con- 

 jointly with the North of England and Mirlland Obstetrical and Gyna:- 

 cological Societies), at 10.30 am.- Dr. H. Tweedy and Others: Discussion 

 on The Treatmerit of Antepartum Ha;morrhage. — At 2. — Dr. E. Holland 

 and Others : Discu-sion on Rupture of ("tesarean Section Scar in Subse- 

 quent Pregnancy or Labour. 



RovAL Institution of Great Britain, at 3. — R. Campbell Thompson : 

 The Legends of the Babylonians. 



Royal Society, at i,.-i,o.~ Probable Pape-s: R. H. Fowler, F. C. Gallop, 

 C. N. H. Lock, an 1 H. W. Richmond : The Aerodvnamics of a Spinning 

 Shell.— Prof. W. E. Dalby : Researches on the Elastic Properties and 

 the Plastic Kxtension of Metal.s.— C. T. R. Wilson : Investigations on 

 Lightning DLscharges and on the Electric Field of Thunderstorms. — 

 L. F. Richardson: 'J he Supply of Energy to Atmospheric Eddies. 



LiNNEAN Society of London, at 5. — Dr. G. P Bidder : Notes on the 

 Physiology of Sponges. Pando'ina s/>ongiarit»t, a.^KW ^p^c\t!< of Alga 

 found in a Sponge. — E. J. Bedford : The British Mar~h Orchids and their 

 Varieties, Illustrated by Coloured Drawings and Lantern Slides. 



Chemical Society, at S.— G. M. Bennett: The Mustard Gas Problem.— 

 C. K. Ingold: A New Metho 1 of Preparing Muconic Acid. — J. W. 

 Cook and O. L. Brady: The Dinitration of w-Acetotoluidide. — V. 

 Venkataramayya and M. V. Narasimhaswamy : A New Ozoniser. — 

 G. T. Morgah and H. D. K. Drew : Orthochlorodinitrotoluenes. Part I. 



FRIDAY, May 7. 



Iron and Steel Institute (at Institution of Civil Engineers) (General 

 Meeting), at 10 a.m.— C. A. Ablett : Direct Current compared with Three 

 Phase Current for l^riving Steel Works Plant.— J. P. W ilson : Notes on 

 Slag Conditions in Open-hearth Basic S'eelmaking Practice. — B. Vaneske 

 and G. A. Wood: The Reduction of Silicon from the Slag in the Acid 

 Open-hearth Process.— At 2.30.— W. E. Hughes: Some Defects in Electro- 

 deposited Iron.— T. Baker and T. K. Rutsell : Note on the Ball Test.— 

 J. H.Whiteley : The Distribution of Phosphorus in Steel between Points 

 Act and AC3. — G. F. Preston : Practical Notes on the Design and 

 Treatment of Steel Castings. 



Royal Society of Medicine (Laryngology Section), at 4. — Annual 

 General Meeting. 



Royal Astronomical Society. (Geophysical Di.scu.ssion), at 5. — Prof. 

 R. a. Sampson and Others : The Use of Wireless Telegraphy in the Deter- 

 mination of Longitude. 



Royal Institution of Great Britain, at 9.— Lord Rayleigh : The 

 Blue Sky and the Optical Properties of Air. 



SATURDAY, May 8. 



Royal In.stitution of Great Britain, at 3.— Dr. F. Chamberlin : The 

 Private Character of Queen Elizabeth. 



British Psychological Society (at Bedford College), at 3.30.— Dr. E. W. 

 Scripture: Speech Inscriptions in Normal and Abnormal Conditions. — 

 A. Klein: Camouflage in Land Warfare. 



CONTENTS. PAGE 



The Chemical Industries of German Rhineland . . 253 

 Man : Past and Present. By Prof. G. Elliot Smith, 



F.R.S. , ........ 255 



Critical Mathematics. By G. B. M. . ..... .256 



The Proteins . . . . 257 



Science and Enefineering. By Wl C. U. .\ . '. 258 



Health and the Teacher . .'. .259 



Our Bookshelf ... ... '259 



Letters to the Editor: — 



Theories of Atomic Structure.— Irving Langmuir 261 



Decimal Coinage. — Harry AUcock 261 



International Council for Fishery Investigations.— 



X. Y. Z . 26a 



The Plumage Bill and Bird Protection. — Prof. J. E. 



Duerden ... 263 



The Standard of Atomic Weights.— Prof. J. R. 



Partington . . ........ 264 



Mortlakes as a Cause of River-windings. ( IVi'lh 

 Dhgr.m.)—T. S. Ellis ..... . .264 



Eiffel Tower Wireless Time-signals. — Prof. R. A. 



Sampson, F.R.S 265 



Some Tests of the loo-in. Hooker Telescope. {Illus- 



trated.) By Dr. Georee E. Hale, For.Mem.R.S. . 266 



Artillery Science. By Sir George Greenhill, F.R.S. 268 

 Obituary : — 



Dr. Rudolph Messel, F.R.S. By H. E. A. . . 270 



Prof. A. K. Huntington 271 



Dr. A. J. Chalmers 271 



Prof. L. T. O'Shea. By A. McW 272 



Notes ... 273 



Our Astronomical Column : — 



Eclipse of the Moon 276 



Mars and Wireless Signals 276 



The April Meteor Shower 276 



The Wasting of Stellar Substance 276 



Map-making in India. Bv T. H. H. . . . ... . 277 



Melanism in British Lepidoptera 278 



University Developments at Manchester 278 



Courses on the History of Science 279 



Marine Biological Structures and Functions . . 279 



The Propagation of Flame in Gaseous Mixtures 279 



University and Educational Intelligence 280 



Societies and Academies 281 



Books Received 283 



Diary of Societies .... 283 



NO. 2635, VOL. 105] 



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