348 



NATURE 



[May 13, 1920 



RoVAL Society of Mbdicink (Clinical Section), at 5-30.— Annual General 



Meeting. 

 Mai-acologicai. Society of London (at Linnean Society), at 6. 

 Institution of Elkctrical Enginkkrs (Students' Meetine) (at King's 



College), at 7.— E. G. Humfress : Electrical Motor Control Devices.— 



The Meeting will be preceded by the Annual General Meetine. 

 Junior Institution of Enginkf,r<:, at 7.30. — Hon. H. Fletcher 



Moulton and Others : Discussion on The Business Aspect of the Peace 



Treaty. 

 Society or Tropical Medicinb and Hygiene (at 11 Chandas Street, 



W.i), at 8.30. — Dr. E. J. Wood : A Consideration of Pellagra from the 



Standpoint of a " Deficiency Disease." 

 Royal Institution of Great Britain, at 9.— Prof. Karl Pearson : 

 . Sidelights on the Evolution of Man. 



SATURDAY, May 15. 



Royal Institution of Great Britain, at 3.— Frederic Harrison : 

 A' Philosophical Synthesis as proposed by Auguste Corate. 



MONDAY. May 17. 



Victoria Institute (at Central Hall, Westminster), at 4.^0. — Bishop G* 



Forrest Browne : Monumental Art in Early England, Caledonia, and 



Ireland. 

 Roval Institute of British Architects, at 8. — B. J. Lubschez: The 



Two Great Railway Stations of New York. 

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



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



Lectures). 

 Royal Geographical Society (at .lEolian Hall), at 8.30. — Capt. F. 



Kingdon Ward : The Valleys of Kham. 



TUESDAY, May 18. 



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



Ethnology: The Invaders of England. 

 Royal Society of Medicine, at 5. — General Meetiftg. 

 Royal Statistical Society, at 5.15.— V._B. Guild: yariations_ in 



the Numbers of Livestock and in the Production of Meat in the United 



Kins;dom during the War. 

 Institution ok Petroleum Technologists (at Roval Society of Arts), 



at 5.30. — R. Stirling : Air Lift System of Pumping Oil Wells. 

 Royal Photographic Society of_ Great Britain (Lantern Meeting), 



at 7. — A. C. Vowles : Wanderings in Mesopotamia (Babvlon). 

 Royal Anthropological Institute, at 8.15.— Sir Henry Howorth : 



Buddhism in the Pacific. 



WEDNESDAY, yiK\T.<i. 



Society of Glass Technology (at Institute of Chemistrv), at 2.— C. J. 

 Peddle and Others : Discussion on The Physical Properties of Glass. — 

 C. J. Peddle : The Development of Various Types of Glass. Part i. : 

 The Interaction of Silica with the Oxides of Sodium and Potassium. 

 Part ii. : The Interaction of Silica. Lime, and Sodiuni Oxide. Part iii. : 

 The Interaction of Silica, Lime, and Potassium Oxide. Part iv. : The 

 Interaction of Silica, Lime, and the Oxides of Sodium and Potassium. 

 Part V. : A Comparison of the Soda-Lime-Silica and the Potash-Lime-Silica 

 Glasses.— Dr. M. W. Travers : A Surface Effect in Glass, Probably Caused 

 by Re-heating.— S. English and Dr. W. E. S. Turner : The Thermal 

 Expansion of Magnesia-containing Glasses. — J. R. Clarke and Dr. W. E. S. 

 Turner: The Optical Properties of Some Lime-Soda Glasses. — 

 S. English and Dr. W. E. S. Turner : The Annealing Temperatures of 

 Soda-Lime and Soda-Magnesia Glasses. — J. D. Cauwood, J. R. Clarke, 

 Miss C. M. M. Muirhead, and Dr. W. E. S. Turner : The Durability of 

 Lime-Soda Glasses.— J. R. Clarke and Dr. W. E. S. Turner : The In- 

 fluence of Lime on the Value of Young's Modulus of Elasticity for the 

 Lime-Soda Glasses.— S. English and Dr. W. E. S. Turner: The Density 

 of Soda-Magnesia Glasses and a Comparison with that of the Soda-Lime 

 Glasses. 



Royal Society of Arts, at 4.30.— J. S. Highfield, Dr. W. R. Ormandy, 

 and D. Northall-Laurie : The Commercial Applications of Electrical 

 Osmosis. 



Royal Society of Medicine (History of Medicine Section), at 5. — 

 Annual General Meeting. — Dr. Withington : The Medical Terms in 

 Liddell and Scott. 



Royal Mfteorological Society, at 5. — Dr. Griffith Taylor: Agri- 

 cultural Climatology of Australia. — J. E. Clark and H. B. Adames : 

 Report on the Phenological Observations for 1919. 



Geoi ogical Society of London, at 5.30 — Dr. H. H. Thomas: Certain 

 Xenolithic Tertiary Minor Intrusions in the Island of Mull (Argyllshire). 



Royal Microscopical Society, at 8. — Annual Exhibition of Microscopic 

 Pond Life. 



THURSDAY,M\W2o. 



Royal Institution of Great Britain, at 3. — A. P. Graves: Welsh and 

 Irish Folk Song. 



Royal Society, at 4.30. — Probnble Papers. — Prof. J. N. Collie : Some 

 Notes on Krypton and Xenon. — Sih Ling Ting : Experiments on Electron 

 Emission from Hot Bodies, with a Preface by Prof. O. W. Richardson. — 

 Dr. L. Silberstein : The Aspherical Nucleus Theory Applied to the 

 Balmer Series of Hydrogen. — Dr. T. E. Stanton, Miss D. Marshall, and 

 Mrs. C. N. Bryant : The Conditions at the Boundary of a Fluid in 

 Turbulent Motion. 



Royal Society of Arts (Indian Section), at 4.30. — Brig.-Gen. Lord 

 Montagu of Beaulieu : Roads and Transport in India. 



Royal Society of Medicine (Dermatology Section), at 5.— Annual 

 General Meeting. 



Institution of Mining and Metallurgy (at Geological Society), at 

 5.30. — G. Rigg: Roasting and Lead-Smelting Practice at the Port Pirie 

 (S.A.) Plant of the Broken Hill Associated Smelters Proprietary, 

 Ltd.' — Capt. H. Tatham : Tunnelling in the Sand Dunes of the 

 Belgian Coast. 



Institution of Electrical ENGiNEERs(at Institution of Civil Engineers), 



at 5.30 (Annual General Meeting). 

 Optical Society, at 7.30.— B. K. lohnson : The No. 7 Dial Sight, 



Mk. II.— Lt.-Col. Gifford : A Short High Power Telescope. 

 Chemical Society (Ordinary and Informal Meeting), at 8. 



FRIDAY, May 21. 

 Royal Society or Medicine (Otology Section), at 5.— Annual Genera 



Meeting. 

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



P. Coursey : Some Methods of Eliminating Atmospherics in Wireles 



Reception. 

 Royal Society of Medicine (Electro-Therapeutics Section), at 8.30.— 



Annual General Meeting. 

 Royal Institution of Great Britain, at 9.— Prod J. A. Fleming : 



The Thermionic Valve in Wireless Telegraphy and Telephony. 



SATURDAY, May 22. 

 Royal Institution of Great Aritain, at 3. — Frederic Harrison : The 

 Re-aciion and the Critics of the Ppsitivist School of Thought. 



CONTENTS. PAGE 



The Federation of Science 317 



Lord Kitchener as a Scientific Worker 319 



The Nation's Food. By Dr. E. J. Russell, F.R.S. . 320 



Differential Geometry. By G. B. M • . . 321 



A Garden in the Dunes. By G. A. J. C 322 



Our Bookshelf 323 



Letters to the Editor:— 



The Indian Chemical Service. — Prof. Jocelyn 



Thorpe, F.R.S. ; Sir PrafuUa Chandra Ray . 



The Cost of Scientific Publications.— Prof. W. A. 



Herdman, F.R.S.; Prof. H. H. Turner, 



F.R.S. ; E. B. Knobel ; Walter W. Bryant . 



Atomic and Molecular Forces and Crystal Structure. 



(Wltk Diagram.)— Dt. A. E. Oxley 



Wasps.— W. F. Denning 



Dr. J. G. Bartholomew and the Layer System of 



Contour Colouring.— Geo. G. Chisholm .... 



The Prismatic Astrolabe. {With Diagrams.) By 



E. H. H 



324 



326 



327 

 328 



328 



329 



The Heart of a Continent. (Illustrated.) By 



Douglas Carruthers 33° 



The United States National Research Council. By 



Prof. Vernon Kellogg 33* 



Obituary : — 



Marlborough R. Pryor, By Prof. T, G. Bonney, 



F.R.S. . 333 



Notes 335 



Our Astronomical Column : — 



Conjunction of Mars with Spica 340 



The Duplicity of v Geminorum 340 



Kodaikanal Observations of Prominences 340 



Leonardo da Vinci. IL By Edward McCurdy . . 340 



Aeronautical Research 342 



Conjoint Board of Scientific Societies 343 



Agricultural Development in the West Indies ... 344 



A Simple Viscometer ..... 344 



The Chemical Society and its New By-laws ... 344 



University and Educational Intelligence ..... 345 



Societies and Academies 34^ 



Books Received 347 



Diary of Societies . 347 



Editorial and Publishing Offices: 



MACMILLAN AND CO., Ltd., 



Sr. MARTIN'S STREET, LONDON, W.C.2. 



Advertisements and business letters to be addressed to the 

 Publishers. 



Editorial Communications to the Editor. 

 Telegraphic Address : Phusis, London. 

 Telephone Number: Gerrard 8830. 



NO. 263/, VOL. 105] 



