88 



NATURE 



[April 8, 1920 



Diary of Societies. 



THURSDAY, April 8. 

 Institution of Automobile Engineers (Graduates' Section) (at 28 



Victoria Street), at 8.— W. D. Pile : I he Use of Benzol. 

 IRoVAL Society of Medicine (Obstetrics and Gynaecology Section), 



at 8. 



FRIDAY, April 9. 

 Royal Astronomical Society, at 5.— E. E. Barnard : Naked-eye Ob- 

 servations of Nova Aquilae lU. — Col. E. H. Hills: The Suspended 



Zenith Telescope of Durham Observatory, Part I. — Rev. A. L. Cortie : 



The Great Sun-spot Groups and the Magnetic Stprm, 1920 March 22-23. 

 •Concrete Institute, at 6.— T. J. Clark : The Uses of Concrete. 

 •Malacological Society ok London (at Linnean Society), at 6. 

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



C. H. AVoodfield and Others : Discussion on Cranes : Their Use and Abuse. 

 Junior Institution of Engineers, at 7.30.— A. H. Howe: The 



Development and Manufacture of the Thermionic Valve. 

 Royal Society of Medicine (Anaesthetics Section), at 8.15.— (Annual 



General Meeting), at 8.30. — Mrs. D. Berry and Others: Discussion on 



Anxsthisia in Operations on the Thyroid Gland. 

 MONDAY, April 12. 

 Victoria Institute (at the Central Hall, VVestminster), at 4.30.— Rev- 



Dr. J. F. H. Thomson : The Pentateuch of the Samaritans : When They 



Got It, ^nd Whence. 

 RovaL Geographical Society (at Lowther Lodge), at 5.— Col. SirSidn«y 



Burrard : A Brief Revievi' of the Evidence upon which the Theory of 



Isoslasy is Based. 

 R'OVAL Institution of Great Britain (General Meeting), at 5. 

 Society of Engineers (at Gtological Society), at 5.30.— Prof. E. R. 



Matthews: (i) Flood Prevention Works at Troon, Ayrshire; (2) The 



Action of Sea Water on Concrete. 

 Surveyors' Institution (Junior Meeting), at 7. 

 Royal Institute of British Architects, at 8. 

 Aristotelian Society (at 74 Grosvenor Street), at 8.— J. W. Scott, Dr. 



G. E. Moiore, Prof. H. Wildon Garr, and Prof. G. Dawes Hicks : Sym- 



posium on Is the "Concrete Univetsal " the True Type of Universality ? 

 ^OVAL Society of Arts, at 8. — Dr. W. Rosenhain: Aluminium and i 

 Alloys (Cantor Lecture). 



Society of Chemical Industry (at Chemical Society), at 8. — Dr. 

 Winifred E. Brenchley and E. H. Richards : The Fertilising Value of 

 Sewage Sludges. — Dr. E. P. Perman: A New Test for Incorporation. — 

 Prof. T. M. Lowry and L. P. McHatton : Experiments on Decrepitation. 



Institution of Electrical Engineers (Students' Meeting) (at 

 Instiiulion of Mtchanical Engineers), at 8.— Joint Discussion with the 

 Graduates' Association of the Institution of Mechanical Engineers on The 

 Six-hour Working Day and its Effect on Industry. 



TUESDAY, April 13. 

 Royal Horticultural Society, at 3.— Dr. A. B. Rendle: Plants Of 



Interest in the Day's Exhibition. 

 Royal Institution of Great Britain, at 3. — Major G. W. C. Kaye: 



Recent Advances in X-ray Work. 

 Institution of Civil Engineers, at 5.30. — Lt.-Col. J. K. Robertson: 



Richborough Military Transportation Depot. — Major F. O. Stanford: 



The War Department Cross- Channel Train- Ferry. 

 Zoological Society OF London, at 5.30. — Arthur Willey: An Apodous 



Amia cahta — H. A. Baylis and Dr. Clayton Lane: A Revis'on of the 



Nematode Family Gnathostomidae. — Dr. W. J. Dakin : The Onychophora 



of Western Australia.— A. M. Aitson : '1 he Life-history and Habits of Two 



Parasites of the Blowfly. . 



Royal Photographic Society of Great Britain (Scientific and 



'lecbnical Group), at 7. — A. C. Banfield: Prisms. — A. J. Munro: 



Machinery used in the Manufacture of Photographic Plates. 

 Quekett Microscopical Ci ub (at 20 Hanover Square), at 7 30. 

 Royal Anthropological Institute, at 8.15. — A. O. Neville: The 



Western Australian Aborigines : Their Treatment and Care. 



IVEDNESDAY, April 14. 

 Royal United Service Institution, at 3. — Lt.-Col. J. Shakespear : 



Recent Events on the Assam Frontier. 

 Royal Society of Arts, at 4.30.— J. Thorp : The Fundamental Basis of 



Good Printine. 

 British Psychological Society (Education Section) (at London Day 



Training College), at 6.- C. A. Claremont : The Functioning of the Will : 



A Suggested Application of Herrington's Work on Reflexes. 

 Royal Aeronautical Society (at Royal Society of Arts), at 8. — Capt. 



P. D. Acland : Trans continental Flying. 

 Institution of Automobilk Engineers (at Institution of Mechanical 



Engineers), at 8 —Dr. W. H. Hatfield : The Most Suitable Steels 

 < ' for Automobile Parts. 

 Society of Public Analysts and other Analytical Chemists (at 



Chemical Society), at 8. — A. E. Parkes : The Turbidity Temperature of 

 . Fats, Oils, and Fatly Acids, Part I.— Dr G. W Monier-VVilliams : The 



Interpretation of Milk Records. — Dr. A. F. Joseph and G. A. Freak: 



The Lo'sof Free Ammonia from Drinking-Water Samples. — E. Sinkinson : 



A Decanting and Filter- W ashing Machine. 



' THURSDAY, April i;. 

 Royal Institution of Great Britain, at 3. — S. Skinner: Ebullition 



and Evauoration. 

 Royal Society of Arts (Indian Section), at 4.30.— Sir George 



Buchanan : The Ports of India : Their Administration and Development. 

 Linnean Society, at 5. — Capt. F. Kingdon Ward : Natural History 



Exploration on the North-east Frontier of Burma. — R. Paulson: 



Exhibition of Lantern-slides illustrating Definite Stages in the Sporulation 



and Gonidia within the Thallus of the Lichen Evernia prunastri, Ach. 

 RoYAii Society of Medicine (Dermatology Section), at 5. 

 Institution of Mining and Metallurgy (Annual General Meeting) 



(at Geological Society), at 5.30. 

 Child-Study Society (at koyal Sanitary Institute), at 6.— Prof. W. 



Ripman :• Spelling Reform. 



Institution of Electrical Engineers (at Institution of Civil 



Engineers), at 6.— Dr. C. V. Drysdale : Modern Marine Problems 



(Kelvin Lecture). , o • j t- u 1 \ 



Optical Society (at Imperial CoUeee of Science and lechnology), 



at 7.30.— J. Weir French: The Unaided Eye, Part III.-K. K. 



Walls : The Rock Crystal of Brazil. 

 Chemical Society, at 8. 



FRIDAY, April 16. 

 Concrete Institute, at 6.— E. Fiander Etchells : Submission of Plans 



to Local Authorities. ,„ , ,,. • ^, r- j 



Institution of Electrical Engineers (Students Meeting) (at Faraday 



House), at 7.— 'I. Scoit-1 ageart : The Vacuum Tube as a Transmitter 



and Receiver of Continuous Waves. . 



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



J. E. Baty and Others : Discu'ssion on Planing v Milling. 

 Technical Inspection Association (at Royal Society of Arts), at 7.30. 



— F. R. Wade : Labour Unrest— Its Causes and Cure. 

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



Sir Ernest Rutherford : Development of Radiology (Mackenzie Davidson 



Memorial Lecture). ,»...» v^i n j 



RovAL Institution of Great Britain, at 9.— Prof. J. A. McClelland : 



Ions and Nuclei. 



SATURDAY, April 17. 

 Royal Institution of Great Britain, at 3.— Prof. W. H. Eccles: 



The Thermionic Vacuum Tube as L'etector, Amplifier, and Generator of 



Electrical Oscillations. 



NO. 2632, VOL. 105] 



CONTENTS. PAGE 



The Universities and the Army .157 



Woods and Water Supply. By Dr. Hugh Robert 



Mill .... 158 



The Wilds of South America 159 



Life and Temperature 161 



A University Course in Botany . . ..... 162 



Recent Mathematical Text-books. By J. M. . . . 162 



Our Bookshelf 163 



Letters to the Editor:— 



Knowledge and Power.— " F.O.I." ; Dr. John W. 



Evans, F.RS. , . 165 



The Secondary Spectrum of Hydrogen.— Prof. J. W. 



Nicholson, F.R.S 166 



International Council for Fishery Investigations.— 

 Prof. W. C. Mcintosh, F.R.S. ....... 167 



The Plumage Bill and Bird Protection.— Sir H. H. 

 Johnston, G.C.M.G., K.C.B. ; Prof H. M. 

 Lefroy ; Right Hon. Sir Herbert Maxwell, 

 Bart., F.R.S.; Prof. Arthur Dendy, F.R.S. 168 

 The Magnetic Storm of March 22-23 ^^^ Associated 

 Phenomena.— Dr. A. Crichton Mitchell .... 170 



Science and the New Army.— Prof. A. R. Richard- 

 son I/O 



An Electronic Theory of Isomerism.- W. E. Garner ; 



S. C. Bradford ... 171 



Percussion-Figures.— Dr. B. G. Escher 171 



A Peculiar Halo. {With Biagraffi.)— Capt. C. J. P. 



Cave 171 



Sea-birds : Their Relation to the Fisheries and 

 Agriculture. {m(k Dia^ra^n.) By Dr. Walter E. 



Collinge . ^72 



The Imperial College of Sc ence and Technology 173 

 Magnetic Disturbances and Geological Structure 175 

 British Crop Production. By Dr. Edward J. 



Russell, F.R.S 176 



Notes 178 



Our Astronomical Column : — 



Capella 183 



Cape Observations of the Sun, Mercury, and Venus . 183 

 Basic Slag and its Uses in Agriculture . ... 183 

 Verification of Screw Gauges for Munitions of War 184 



The Composition of Salvarsan 185 



University and Educational Intelligence 185 



Societies and Academies 186 



Books Received 187 



Diary of Societies '88 



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