288 



NATURE 



[April 28, 192 1 



ravarty : The Diffraction of Light Incident at Nearly the Critical 

 Angle "on the Boundary between Two Media. 



Botanic Societx (Regent's rark), at 5.30. 



Institution of Electbical Enchneehs (at Institution of Civil 

 Engineers), at 6. — Discussion on Tariffs. — J. R. Blaikie : Elec- 

 tricity Supply — Present Conditions and the Hopkinson Prinoipleg. 

 — J. VV. Beauchamp : Multi-Part Tariffs for Domestic Electricity 

 Supply. 



CONCEETE Institute, at 7.30.— Prof . P. C. Lea : The Elastic Modulus 

 of Concrete. 



RoiAL Society of Medicine (Urology Section), at 8.30. — R. Thomp- 

 son : Treatment of Epispadias and of Extroversion of the Bladder, 

 with Some Remarks relating to their Origin and Anatomy. 

 FRIDAY, Apeil 29. 



RoiAL College of Scbgeons of England, at 5. — Prof. A. Keith : 

 Demonstration on the Contents of the Museum. 



iNSTiii'TiON of Electrical Engineees (Students' Section) (at City 

 and (Juilds (Engineering) College) (Annual General Meeting), 

 at 6.30. — A. C. Warren : Radio-telegraphic Transmitting Ap- 

 paratus. 



Ji'NiOE Institttion OF Engineees, at 8.— W. A. Tookey : Rambling 

 Remarks on Expert Evidence. 



Ror.AL Institution of Qeeat Britain, at 9.— Sir Frank W. Dyson : 

 Advances in Astronomy. 



SATURDAY, April 30. 



ROTAL Institctiox OF Geeat Britain, at 3.— H. T. Oldham: The 

 Great Epoch of Exploration; (2) Spain. 

 MONDAY, Max 2. 



ViCTOEiA Institute (at Central Buildings, Westminster), at 4.30.— 

 Rev. J. Gosset-Tanner : The Tripartite Nature of Man. 



RoTAL Institution of Geeat Britain, at 5.— Annual Meeting. 



RoTAL College of Surgeons of England, at 5.— Prof. S. G. Shat- 

 tock : Demonstration on Pathological Specimens in the Museum. 



SociEir OF Engineers (Inc.) (at Geological Society), at 5.30.— 

 A. S. E. Ackermann : The Physical Properties of Clay (third 

 paper). 



Aristotelian Societt (at University of London Club), at 8.— Miss 

 H. D. Oakeley : x-rof. Driesch's Attempt to Combine a Philosophv 

 of Knowledge and a Philosophy of Life. 



Rotal Institute of British Architects, at 8. 



Societt of Chemical Industet (at Chemical Society), at 8. 



RoTAL Geographical Society (at ,Bolian Hall), at 8.,30, 



Rotal Sociftt or Medicine (Tropical Diseases and Parasitology 

 Section), at 8.30.— Dr. A. F. MacCallan : The Ankylostomiasis 

 Campaign in Egypt, 1913-1915.- Sir Leonard Rogers: The Mor- 

 tality and Prognosis of Cholera treated by the Author's Hyper- 

 tonic Saline Method, based on 2000 Cases. 



TUESDAY, Mat 3. 



Royal Hobticultural Society, at 3. 



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

 Darwin's Theory of Man's Origin in the Light of Present-Day 

 Evidence. 



Royal Society of Arts (Indian Section), at 4.30.— W. Raitt : 

 Paper-pulp Supplies from India. 



Royal Photographic Society of Great Beitain, at 7.— H. S. 

 Watkins : Colour Photographry. 



Royal Antheopological Institute (at Roval Society), at 8.15.— 

 J. Reid Moir : An .Early Chellean Palseolithio Workshop Site in 

 the Pliocene Forest-bod of Cromer, Norfolk. 

 WEDNESDAY, Mat 4. 



The Institution of Civil Engineers, at 4.— Presentation of the 

 Kelvin Medal to Dr. W. C. Unwin by the Right Hon. A. J. 

 Balfour. 



Royal Society of Aets. at 4.30.— Sir Geoffrey Butler: Arglo- 

 American Relations : A Personal Impression. 



Geological Society of Londo??, at 5.30.— Miss I. A. MacDunald 

 and Dr. A. G. Trueman : The Evolution of Certain Liassio Gas- 

 tropoda, with Special Reference to their Use in Stratigraphy. — 

 H. Hamshaw Thomas: An Ottokhria-like Plant from South Africa. 

 — Dr. A. B. Walkom : Nummnlospermum, gen. nov. : the Probable 

 Megasporangium of Glossopteris. 



Entomological Society of London, at 8. 



iNSTifuTF, of ifEtALS (at Institution of Meohanioal Engineers), at 

 .8.— Prof. T. Turner: The Casting of Metals (Annual May Lec- 

 ture). 



Society of Public Analysts and Other Analytical Chemists (at 

 OhemiCftl Sooiety). at 8.— F. G. H. Tate and .T. W. Poolev : 

 Detection and Estimation of Illipe Nut Fat used as a Substitute 

 for Cocoa Butter. — G. W. Monier Williams: Notes and Demon- 

 stration oh' Apparatus for determining Hvdrogen Ion Concen- 

 tration.--E. Paul : Note on the Oil of Oats.— H. Atkinson : 

 Estimation of Potassium in Presence of Sodium, Magnesium, 

 Sulphates, and Phosphates. 



THURSDAY. Mat 5. 



Iron and Steel Institute (Annual Meeting) (at Institution of Civil 

 Engineers), at 10 and 2.30.— H. Brearlev : The Welding of Steel 

 in relation to the Occurrence of Pipe Blow Holes and Segregates 

 in Ingots.— Dr. J. E. Stead :' Solid Solution of Oxygen in Iron.- 

 H. T. Ringrose : Scientific Control of Combustion.— J. E. Fletcher : 

 Open-hearth and Other Slags— their Composition and Graphic 

 Methods for determining their Constitution. — S. H. Fowles : 

 Notes on the Cleaning of Blast-furnace Gas. 



Royal Institution of Great Britain, at 3.— Dr. C. S. Myers : 

 Psychological Studies: a) The Localisation of Sound. 



Royal Society, at 4 30.— Dr. H. Head : Release of Function in the 

 Nervous System (Croonian Lecture). 



LiNNKAN Society, at 5.— Prof . .T. Stanley Gardiner : Reports on 

 Collections from the Indian Ocean for Issue in the Society's 



Forthcoming Transactions, vol. xviii. — E. R. Speyer : Ineects 

 in Relation to Reproduction in Coniferous Trees. — Prof. W. J. 

 Dakin : The Collections from the Houtman Abrolhos Islands 

 in 1913. 



Child-Study Society (at Royal Sanitary Institute), at 6.— Miss 

 F. E. Webb and Others : Individual Training in the School. 



Institution of Electrical Engineers (at Institution of Civil En- 

 gineers), at 6. — Discussion on Tariffs (continued). 



Chemical Society, at 8. 



Royal Society of Medicine (Obstetrics and Gynsecology Section), 

 at 8. — Annual General Meeting. — H. Curtis : Angioma of the 

 A'agina Spontaneously Evacuated. — Dr. A. E. Giles and Others : 

 The Causes and Treatment of Sterility. 



FRIDAY, May 6. 



Iron and Steel Institute (Annual Meeting) (at Institution of Civil 

 Engineers), at 10 and 2.30. — S. N. Brayshaw : The Prevention of 

 Hardening Cracks, and the Effect of Controlling the Recalescence 

 of a Tungsten Tool Steel.— Dr. J. Newton Friend : The Pro- 

 tection of Iron with Paint against Atmospheric Corrosion. — 

 K. Honda, T. Matsushita, and S. Idei : The Cause of Quenching 

 Cracks. — W. E. Hughes : Slip-lines and Twinning in Electro->> 

 deposited Iron. — A. Westgren : Rontgen Spectrographic Investi- 

 gations of Iron and Steel. — J. H. Whiteley : Cupric Etching 

 Effects produced by Phosphorus and Oxygen in Iron. 



Rotal Societt of Medicine (Laryngology" Section), at 4.45.— Annual 

 General Meeting. 



Rotal Astronomical Societt (Geophysical Discussion'), at 5.— Sir 

 Napier Shaw, Col. E. Gold, W. H. Dines, and F. J. W. Whipple: 

 The Structure of the Atmosphere up to 20 kilometres. Chair- 

 man : Dr. 'G. C. Simpson. 



Royal Institution of Great Britain, at 9. — Sir Robert Robertson : 

 War Developments of Explosives. 



SATURDAY, Mat 7. 

 Roval Institution of Great Britain, at 3.— Prof. E. C. C. Baly : 

 Chemical Reaction. 



NO. 2687, 'V'OL. IO7I 



CONTENTS. PAGE 



Agriculture and Fisheries in the Civil Service 



Estimates .... 257 



A Sportsman-Naturalist 259 



British Iron Ores. By Prof. H, Louis . . . 261 

 Physical and Inorganic Chemistry. By Prof. J. R. 



Partington „ . 262 



Our Bookshelf 263 



Letters to the Editor:— 



The Internal Physics of Metals.— Sir George 



Beilby, F.R.S. ; The Writer of the Article . 265 

 Biological Terminology. — Sir G. Archdall Reid, 



K.B.E. 265 



The " Flight" of Flying-fish.— Julian S. Huxley 267 

 The Concept of "Space" in Physics. — Dr. Harold 



Jeffreys . . . 267 



The Origin of "Churning at 62°" on Dairy Ther- 

 mometers. — R. Hedger Wallace 268 



Yoimg's Interference Experiment. — Dr. R. A, 



Houstoun ... . 268 



The Electrodeless Discharge in Sodium Vapour. — 



Prof. John K. Robertson 269 

 High-speed Aircraft Propellers and the Destruttion of 



Gnats.— Henry C. Watts 269 



Why do Worms Die?— Q. T. Harris 269 



Vejetation around London Earlier than in the 



Provinces. — Chas. Harding 269 



A Modern Inorganic Chemistry. — Prof. J. R, 



Partington ; The Reviewer 269 



The High Pamir. {Ilhtstrated) 27a 



Primitive Chronology. By Dr. J. L. E. Dreyer . 274 

 Obituary: — 



Prof. A. W. Reinold, F.R.S. By W. N. S. , . 276 



Robert Allen Rolfe 276 



Notes 277 



Our Astronomical Column : — 



The Accelerations of the Sun and Moon 281 



1646 Spectroscopic Parallaxes 281 



A Catalogue of Radial Velocities 281 



The Microstructure of Coal . 282 



The Cretaceous-Tertiary Boundary in North 



America. By Prof. A. C. Seward, F.R.S 282 



Isle of Wight Disease in Hive Bees. By Dr. A. D. 



Imms 283 



University and Educational Intelligence . . . 284 



Calendar of Scientific Pioneers 285 



Societies and Academies 285 



Books Received 287 



Diary of Societies ........ . 287 



