476 



NATURE 



[June io, 1920 



Tellurium ",(2) Mercury, Cadmium, Zinc, Phosphorus, Arsenic, Antimony. 

 — Dr. A. E H Tutton : Monoclinic Double Selenates of the Copper Group. 

 — H. G. » annon : Production and '1 ransmission of an Knvirorrasntal Effect 

 in Sintocephahii zieiului.— 'E.. C. Gtey : The Enzymes of B. colt 

 commitnis 'vWxch are I oncerned in the Decomposition of Glucose and 

 Manitol. I^rt IV. The Fermentation of Glucose in the Presence of 

 Formic Acid.— L. T. Hogben : Studies on Synapsis. II. Parallel Con- 

 jugation and the Prophase Complex in Periplaneta, with Special 

 Reference to the Premeiotic Ttlophase. 



London Mathematical Society, at 5. — G. I. Taylor : (i) Tidal 

 Oscillations in Gulfs and Rectangular Basins. (2) Diffusion by Con- 

 tinuous Movements. — H. K. C. Darling : Proofs of certain Identities and 

 Congruences enunciated by Mr. S. Ramanujan — M. J. M. Hill : The 

 irreducibility of (he Solution fan Algebraic Differential Equation. — F. B. 

 Pidduck: Functions of Limiting Matrices. — W. P. Milne: The Relation 

 between Apolanty and a certain Porism of the Cubic Curve. 



Royal Coi lege of Physicians of London, at 5. — Dr. A. F. Hurst: 

 The Psychology of the Special Senses and their Hysterical Disorders 

 (Croonian Lecture). 



CoisCKETE Institute, at 7.30 — E. L.Joseph: Ventilation and Air-Purifi- 

 cation as applied to Modern Concrete Buildings. 



Optical Society, at 7.30.— Miss A. B. Dale: Accuracy of Setting.— 

 Dr. J. S. Anderson : A New Method of Immersion Refractometry. 



Institute of Metals (at Institution of Mechanical Engineers), at 8. — 

 Prof. C. A. F. Brncdicks : Recent Progress in Thermo-Electricity 

 (Annual May Lecture). 



Society of Antiquaries, at 8.^0. 



FRIDAY, June ii. 



Institution of Mining Engineers (at Geological Society), from n a.m. 

 to 5. 



Royal Astronomical Society, at 5. — E. E. Barnard :_ Nova Persei 

 No. 2 (.Anderson). — A. S. Eddington : Radiation-pressure in Solar Pheno- 

 mena.— R. A.Sampson: Geophysical Discussions, 1Q20 May 7: De- 

 termination of Longitude by Wireless Telegraphy. — Gen. Ferris : 

 Noie sur les precedes actuels d'emploi de la telegraphie sans fil dans la 

 determination de< longitudes. — R. A. Fisher: A Mathematical Exam- 

 ination of the Methods of Determining the Accuracy of an Observation by 

 the Mean Error and by the Square Mean Error. — H. S. Plaskeit : I'he 

 Intensity Distribution in the Continuous Spectrum and the Intensity of 

 the Hydrogen Lines in y Cassiopeiae. — J. Lunt : The Spectra of ^lova 

 .\quila2 No. 3. Third Paper. 



Physical Society of London, at 5. — Dr. T. Barratt and A.J. Scott: 

 Radiation and Convection from Heated Surfaces.— J. S. G. Thomas: 

 An Electrical Hot-Wire Inclinometer. — L. F. Richardson : Convective 

 Cooling and the Theory of Dimensi.-ns.- J. W. T. WaUh : The Radiation 

 from a Perfectly Diffusing Circular Disc. 



Malacological Society of London (at Linnean Society), at 6. 

 MONDAY, June 14. 



Victoria Institute (at Central Hall, Westminster), at 4.30. — Very 

 Rev. Dean Inge: Freedom and Discipline (Annual Address). 



Society of Chemical Industry (London Section) (at Central House, 

 Finsbury Square), at 5. — (Annual Meeting.) 



Society of Engineers (at (Geological Society), Special Summer Meeting, 

 at 5.30. — E. ' ressy : Great Engineering .Adveniures. 



Faraday .Society (at Chemical Society), at 8.— Dr. A. Fleck andT. Wallace : 

 Conduction of Elrctricity through Fused Sodium Hydrate. — Dr. H. F. 

 Haworth : The Measurement of Electrolytic Resistance using Alter- 

 nating Currents. — J. L. Haug'iton : The Measurement of h lectrical 

 Conductivity in Meials and Alloys at High Temperatures. — N. V. S. 

 Knibbs and H. Palfreeman : The Theory of El ctrochemical Chlorate 

 and Perchlorate Formation. — J. B. Firth : The Sorptijn of Iodine by 

 Carbon. — F. H. Jeffery : The Electrolysis of Solutions of Sodium 

 Nitrate using a Copper Anode. — Mr. A. M. Williams: The Pressure 

 Variation of the Equilibrium Constant in Dilute Solution. — Miss 

 Nina Hosali : Description of Models illustrating Crystalline Form and 

 Symmetry. 



TUESDAY, June 15. 



R0Y.AL Horticultural Society, at 3.— Dr. A. B. Rendle : Plants of 

 Interest in the Day's Exhibition. 



Royal College of Physicians of London, at 5.— Dr. A. F. Hurst: 

 The Psychology of the Special Senses and their Hysterical Disorders 



■ (Croonian I ecture). 



Royal Statistical Society, at 5.15. — G. F. Shirras: Some Effects of the 

 War on Gold and Silver. 



Mine JALOGICAL Society (at Geological Society), at 5.30. — W. A. 

 Richardson : The Fibrous Gypsum of Nottinahamshire. — F. P. Mennell : 

 Rare Zinc-Copper Minerals from the Rhodesiaii Broken Hill Mine, 

 Ni.rthern Rhodesia.— Prof. R. Ohashi : The Plumbiferous Barytes from 

 Shibukuro, Prefecture of Akita, Japan. — W. A. Richardson : A New 

 Model Rotating Stage Petrological Microscope. 



Zoological Society of London, at 5.30. — Dr. P. Chalme-s Mitciiell : 

 Report on the Ariditi jus to the Society's Menag .rie during the Month of 

 May, 1920. — Prof. J. V.. Duerden : Exhibition of, and Remark on, 

 Ostrich Eggs. — Miss Joan B. Procter: (i) A Colle^jti n of Tailless 

 Batrachians from East Africa made by Mr. A. I.overidge in the Years 

 1914-19. <2) The Type-specimen of Rma holstj, Bou enger. — R. I. 

 Pocock : The External and Cranial Characters of the European Badger 

 (Mele.s) and the A.ner can Badger (Taxidea).— Dr. K. J. Tillyard : The 

 Life-history of the Dragon-fly. 



Royal Anthroi'Ologicai. Institute, .at 8.15. — Prof F. G. Parsons: 

 Distribution of Hair and Eye Colour in the British Isles. 

 WEDNESDAY, ]vtiv.\(>. 



Royal Meteorological Socihty (at t»e Royal Astronomical 

 Society), at 5.— W. H. Dines: The Ether Differential Radiomeer.— 

 Prof. S. Chapman and E. A. Milne : The Composition, lonisation, and 

 Vi-cosity of the Atmosphere at Great Heights. 



Institution of Electrical Engineers (at Institution of Mechanical 

 Kngineers), at 6. — Discussion on paper read by Sir Dugald Clerk before 

 the Royal Society of Arts, entitled Distribution of Heat, Light, and 

 Motive Power by Gas and Electricity.— Sir Dugald Clerk, Prof A. 

 Smithells, and Prof J. W. Cobb : The Report on the Coal-Gas and 

 Electrical Supply Industries of the United Kingdom to the President of 

 the Institution of Gas Engineer.'. 



NO. 2641, VOL. 105] 



Royal Microscopical Sociktv, at 8. — Sir Horace Darwin and W. G. 

 Collins: A Universal Microtome.— L. Hogben: The Problem of 

 Synapsis. 



THURSDAY, June 17. 



Royal Society, at 4.30. — Prof. W. Bateson : Genetic Segregation (Croonian 

 Lecture). 



Linnean Society, at 5.— Celebration of the Centenary of Sir Joseph 

 Banks, Bart. (1743-1820).— Dr. B. Daydon Jackson : Banks as a Tra- 

 veller.— Dr. A. B. Rendle : Banks as a Patron of Science.— J. Britten : 

 Banks as a Botanist. 



Royal College of Physicians ok London, at 5.— Dr. A. F. Hurst : The 

 Psychology of the Special Senses and their Hy.sterical Disorders(Croonian 

 Lecture). 



Chemical Society (at Institution of Mechanical Engineers), at 8.— Prof 

 J. C. McLennan : Helium. 



FRIDAY, Junk 18. 



Royal Society of Arts (Indian Section), at 4.30.— Sir Valentine Chirol : 

 The Knduring Power of Hinduism (Sir George Birdwood Memorial 

 Lecture). 



Geophysical Committee (at Royal Astronomical Society), at 5.— Com- 

 mander H. I). Warburg, Prof H. Lamb, Dr. J. Proudman, Prof. A. F. 

 Dodson, Major A. J. Wolff, and H. L. P. Jolly: Discussion on Tides. 

 SATURDAY, June 19. 



British Psychological Society (at University College, Gower Street), 

 at 3.-^o. — Dr. J. Drever : The Emotional Phases of Affective Experience. 



Physiological Society (at Physiological Laboratory, University of 

 London, Souih-Kensington), at 4.30. — G. AurepandC. Lovatt Evans :The 

 Mode of Action of Vaso-dilator Nerves. — C. Lovatt Evans: The Lactic 

 Acid Content of Plain Muscle. 



CONTENTS. PAGE 



Naval Education .... 445 



The Ultimate Data of Physics. By Prof. G. Dawes 



Hicks 446 



Life and Letters of Silvanus P. Thompson. By 



A. A. Campbell Swinton, F.R.S, 448 



Academic Research and Industrial Application. 



By G. T. M 449 



Ancestral Studies of Compositae 450 



Out Bookshelf . ... 450 



Letters to the Editor:— 



The Organisation of Scientific Work in India. — Sir 

 Thomas H. Holland, K.C.I. E, F.R.S. ... 452 



Anti-Gas Fans.— Prof. A. J. Allmand 453 



Attainment of High Levels in the Atmosphere. — 



W. H. Dines, F.R.S. 454 



Central Wireless Station for Astronomy. — Major 

 William J. S, Lockyer .... 454 



The "Flight" of Flying-fi.sh.— Prof. W. N. F. 



Woodland; Sir David Wilson-Barker . 455 



Fellow- Workers. — Sir Ronald Ross, K.C.B., 

 F.R.S. . ... ...... 455 



The Approximate Evaluation of Definite Integrals 



between Finite Limits.— A. F. Dufton . • . . 455 

 The Cost of Laboratory Fittings.— Alan E. Munby 456 

 The First Act of a Young Thrush. —Honor M. M. 



Perrycoste 456 



Marat and the Deflection of Light.— Prof. W. A. 

 Osborne . . ......... 456 



British and Metric Systems of Weights and Measures. 



—Alfred S. E. Ackermann 456 



Aircraft Photography in the Service of Science. 



(Illustrated.) By H. Hamshaw Thomas . . 457 



The Dynamics of Shell Flight. {lVi(k Diagram,-.) 



By R. H. Fowler 459 



Obituary : — 



Prof. L. Doncaster, F.R.S. By Prof. W^. 



Bateson, F.R.S 461 



Notes ... 462 



Our Astronomical Column : — 



Photographs of the Brorsen-Melcalf Comet 467 



The Planetary Families of Comets 467 



The Thunderstorms of May 29 and the Louth 



Disaster . . 468 



Annual Meeting of the British Science Guild . . 468 

 Annual Visitation of the Royal Observatory, 



Greenwich 4^9 



Applied Statistics. By D. H. ....... 470 



The Imperial College : Claim to University Status. 471 



The Smoke Nuisance. By J. B.C. . . 471 



The Molecular Energy in Gases 472 



University and Educational intelligence .... 472 



Societies and Academies . . . . 473 



Books Received 475 



Diary of Societies 475 



