4i6 



NATURE 



[May 26, 192 1 



(Annual General -Meeting;, at 5.30.— Dr. H. Thursfleld : The 

 Diagnosis of a Case of Renal Calculus in a Child. 



Institution of Mechanical Knoineebs, at 6. — J. G. GraTes : The 

 World's Money System. 



Junior Institution of Engineebs, at 8. — S. A. Stigant : Notes on 

 Electrical Transformer Breakdowns. 



EoYAL Society of Medicine (Epidemiology and State Medicine 

 Section) (Annual General Meeting), at 8.30. — Dr. R. J. Reece : 

 Some Observations on the Occurrence of Cow-pox and Human Cases 

 in Connection Therewith. — Dr. F. R. Blaxall : Some Notes on 

 the Ji'reparation of Vaccine Lymph at the Government Lymph 

 Laboratory. 



BoiAL Institution of Great Britain, at 9.— A. Mallock : Elasticity. 



SATURDAY, Mai 28. 



Royal Institution of Great Britain, at 3. — F. Legge : Onostioism 

 and the Science of Religions. II. 



MONDAY, May 30. 



Surveyohs' In.stitution (Annual Meeting), at 5. 



Royal Geographical Society (at JGolian Hall) (Anniversary Meet- 

 ing), at 5.30. 



Royal Society of Arts, at 8.— Sir Kenneth Weldon Qoadby : Im- 

 munity and Industrial Disease. 



National Union of Scientific Workers (in Botanical Theatre, 

 University College), at 8.— Chairman : Tiscount HaUlane.— Prof. 

 L. Bairstow : The Administration of Scientific Work (followed 

 by a Discussion). 



TUESDAY, Mai 31. 



Royal Ixstitition of Great Britain, at 3. — Sir James Frazer : 

 Romau Life : Tune of Pliny the Younger. 



Faraday Society (at Chemical Society), 4.30-6.30 and 8-10.30.— Dis- 

 cussion on Physico-chemical Problems Relating to the Soil. — 

 Dr. E. J. Russell : A General Survey of the Subject. — B. A. Keen : 

 The System Soil— Soil Moisture.— Prof. D. R. Hoagland : The 

 Soil Solution in Relation to the Plaiit. — Dr. C. A. ShuU : Activity 

 and Imbibition in Relation to Soil Moisture. — H. J. Page: The 

 Part Played by organic Matter in the Soil System.- Prof. Sven 

 Oden : The Application of Physico-chemical Methods to the Study 

 of Humus. — Dr. E. J. Salisbury: The Vertical Distribution of Soil 

 Acidity in Natural Soils and its Relation to the Organic Con- 

 stituents. — E. A. Fisher : The Phenomena of Absorption in Soils : 

 a Critical Discussion of the Hypotheses Put Forward. — E. M. 

 Crowther : Soil Acidity in its Physico-chemical Aspects.— C. G. T. 

 Morison : Pan Formation.— Prof. Sven Oden : The Clays as Dis- 

 perse Systems.— N. M. Comber : The Mechanism of Flocculation 

 in Soils.— Dr. J. AV. Mellor : Plasticity of Clay.— G. W. Robinson : 

 The Physical Properties of the Soil in Relation to Survey Work. 



Institution of Electrical Engineers (at Savoy Place), 5.— Annual 

 General Meeting. 5.45.— Special General "Meeting. At 6.30.— 

 Ordinary Meeting. Dr. F. B. Jewett : Research Work in the United 

 States. 



Boial society of Medicine, at 5.— General Meeting of Fellows. 



Royal Photographic Society of Great Britain, at 7.— Dr. C. T. 

 Holland : The Snow and Ice Scenery of Switierland. 



Royal Anthropological Institute, at 8.15. 



Illuminating Engineering Society (Annual Meeting) (at Roval 

 Society of Arts), at 8.15.- .T. S. Dow: The Use of Artificial 

 Light as an Aid to Various Games and Sports. 

 WEDyESDAY, June 1. 



Royal Society of Medicine (Surgery Section), at 5.30.— C. A. Pan- 

 nett : The Treatment of the Imperfectly Descended Testicle. — 

 Dr. A. Goodman Levy : Cardiac Massage. 



Society of Public Analysts and Other Analytical Chemists (at 

 Chemical Society), at 8.— F. F. Beach, T. E. Needs, and E. 

 Russell : The Composition of Egg Powder.— N. Evers : The Colori- 

 metric Method of Determining Hydrogen-ion Concentration : Some 

 Uses in the Analytical Laboratory.— F. R. Dodd : The Estima- 

 tion of Woody Fibre in Cattle Foods. 



Entomological Society of London, at 8. 



THURSDAY, June 2. 



Royal Society of Medicine (Laryngology Section) (Summer Meet- 

 ing), 2.30 to 6. 



Royal iNsrixirioN of Great Britain, at 3.— Sir Alexander C. Mac- 

 kenzie : Beethoven. 



In-stitute of Pathology and Research (at St. Mary's Hospital), at 

 4.30.— Prof. G. Dreyer : A New Departure in the Serum Diagnosis 

 of Syphilis. 



Royal "society, at 4.30.— Dr. T. M. Lowry and Dr. C. P. Austin: 

 Optical Rotatory Dispersion (The Bakerian Lecture). 



LiNNEAN Society, at 5.— Prof. Garstang and Others : Discussion on 

 Biogenetic Law (Recapitulation). 



Chemical Society, at 8.— H. King : Derivatives of Sulphur in Com- 

 mercial Salvarsan. Part I.— S. Qlasstone : Physical Chemistry of 

 the Oxides of Lead. Part I. The Solubility of Lead Monoxide.— 

 M. O. Forster and AV. B. Saville : Studies in the Camphane 

 Series. Part XXXIX. p-Aminophenvlaminooamphor (Camphoryl- 

 /)-phenylenediamine).— K. Stratton and J. R. Partington: Latent 

 Heats of Fusion. Part T. Bonzophenone, Phenol, and Sulphur.— 

 G. T. Morgan and H. D. K. Drew : Researches on Residual Affinity 

 aid Co-ordination. Part V. Gallium Acetvlacetone and its 

 Analogues.— J. C. Thomlinson : Analysis of Cresol Disinfectants. 

 ~L r • Morgan and D. Webster : Diazo-derivatives of 4-amino- 

 phenyl - 4'-methylbenz - 2/ : 7'-thiazole fOehvdrothio /vtoluidine) — 

 A. K. Macbeth and D. D. Pratt: The Labile Nature of the 

 Halogen Atoms in Substituted Nitroniethanes.— K. G. Naik : The 

 ^"T/P^^on and Properties of Dithioketones (R9C : S : S) and 

 Dithioethers (RS : S). Part II.— K. G. Naik: The Formation 

 A? a -P'opertiPS of Dithioketones fR^C : S : S) and Dithioethers 

 iK2S:S). Part III. Interaction of Sulphur Monochloride with 

 urganic Compounds containing the grouping 

 — CO-CHo— CO-CH.2— CO-. 

 NO. 2691, VOL. 107] 



K. G. Naik : The Formation and Properties of Dithioketones 

 (RjC: S: S) and Dithioethers (R^S: S). Part IV. Interaction of 

 Sulphur Monochloride with Organic Compounds containing 

 — CO— CHo-CO — g.o.4piag, forming the Part of a Closed Ring. — 

 K. G. Naik : The Formation and Properties of Dithioketonea 

 (R2C : S : S) and Dithioetliers (R.2S:S). Part V. Nitration of 

 Ditliioketones and Dithioethers. — K. G. Naik : Interaction of 

 Sulphur Monochloride with Organic Acid Amides. — 8. J. Lewis 

 and F. 31. Wood : A New Adjustable Thermostat for all Tem- 

 peratures between 0° and 100°. — H. Burton and J. Kenner : The 

 Influence of Nitro-groups on the Reactivity of Substituents in 

 the Benzene Nucleus. Part III. The Partial Reduction of the 

 Dinitrotoluenes by Stannous Chloride and Hydrochloric Acid.— 

 J. Kenner and E. Witham : The Influence of Nitro-groups on 

 the Reactivity of Substituents in the Benzene Nucleus. Part IV. 

 The Condensation of Ethyl 3- and 5-nitro-o-Chlorobenzoates with 

 Hydrazines. 



FRIDAY, June 3. 



Royal Society of Medicine (Laryngology Section) (Summer Meet- 

 ing), 10 to 1. 



Association of Economic Biologists (in Botanical liccture Theatre, 

 Imperial College of Science), at 2.30. — F. L. Engledow : Methods 

 of Increasing Yield in Crop Plants. — C. B. Saunders : Some 

 Problems of Seed Testing. — W. Brown : The Physiology of In- 

 fection. 



Royal Photographic Societt or Great Britain, at 8.— M. Adams : 

 Eves in Portraiture. 



Royal Institution of Great Britain, at 9. — Dr. L. Huxley: 

 Chronicles of the Cornhill. 



SATURDAY, June 4. 



Royal Institution of Great Britain, at 3. — Dr. R. S. Rait : 

 " Scotland and France. 



CONTENTS. PAGE 



The Use of Oil Fuel .385 



Education as a Science , 386 



Advances in the Study of the Yeasts. By Dr. David 



Ellis . . 387 



Introduction to the Theory of Cu-ves 388 



Aeronautical Treatises 389 



Our Bookshelf . . . 390 



Letters to the Editor: — 



The Aurora of May 13-15. — Right Hon, Lord 



Rayleierh. F.R.*< . . . 392 



The Gravitational Field of an Electron. — Sir Oliver 



Lodce, F R.S ... 392 



The Magnetic Storm of May 13-17. — Dr. A. 



Crichton Mitchell . , 392 



Ocean Tides. — H. A. Marmer .... . 393 



The Physical Status of " Space."— Dr. Harold 



Jeffreys ... 394 



The Reparation Act and Scientific Research. — Prof. 



J. R. Partington . 394 



The Resonance Theory of Hearing. — Dr. H. Hart- 

 ridge ... 394 

 Hiiemoglobin in Mollusca. — Prof. A. E. Boycott, 



F.R.S. . . 395 



Physiological Reactions in the Protozoa. — J. S. 



Dunk-rly 395 



Picture-hanging Wire. — A.J Stubbs .« 395 



Anode Rays of Beryllium. — G.P.Thomson . . 395 

 The Colours of Primroses. — Dr. G. Abbott 395 



The Japanese Artificially Induced Pearl. {Illus- 

 trated.) By Dr. H. Lyster Jameson . . 396 

 The Recent Magnetic and Electrical Disturbances. 



By Dr. C. Chree, F.R.S 399 



The Recent Large Sun-spot Group. [Illtntrated.) 



Bv H. W. Newton 399 



Obituary : — 



Dr. G. B, Longstaff 401 



Notes ... .... 402 



Our Astronomical Column : — 



Comets . 405 



Theory of Jupiter's Satellites 405 



An Early Chellean Palaeolithic Workshop-site at 



Cromer ...... 406 



Hydrology of the Western States of North America. 

 By Dr. Brysson Cunningham ..... . 406 



The Plaice Fishery in the Belt Sea and Neighbour- 

 ing Waters. By W. C. M 407 



The Melbourne Meeting of the Australas an 



Association. I. 408 



University and Educational Intelligence . .411 



Calendar of Scientific Pioneers 412 



Societic and Academies ... . . 412 



Books Received 415 



Diary of Societies 415 



