536 



NATURE 



[April 22, 1922 



Diary of Societies. 



FRIDAY, APRIL 21. 

 Institute of Transport (at Royal Society of Arts), at 5.— J. K. 



Bruce : The Operation of a Large Tramway Undertaldng, with 



reference to Capacity and Cost under given Conditions. 

 Institution of Production Engineers (at Institution of Mechanical 



Engineers), at 7.30. — J. R. Smith : Electricity in a Machine Shop. 

 Junior Institution of Engineers, at 8. — S. A. Stigant : Condenser 



and Coke Coll Protective Apparatus. 



MONDAY, APRIL 24. 



Royal College of Surgeons of England, at 5. — Prof. Shattock : 

 Demonstration of Museum Specimens illustrating Repair. 



Royal Institute of British Architects (at Olympia), at 6. — Prof. 

 P. Abercromble : What we mean by Town Planning. 



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

 P.. A. C. Hills : Jigs and Tools. 



Royal Society of Medicine (Odontology Section), at 8. — J. H. 

 Mummery : Dental Diseases In Ancient Egypt, demonstrating some 

 Photographs forwarded by the late Sir Armand Ruffer. — E. 

 Sprawson : (1) A Case of Multiple Follicular Odontomes (Dentigerous 

 Cysts) In the Mandible, and some Remarks as to the Pathology of 

 such Cysts. (2) The Significance of the Extra Cusp commonly 

 found in the Antero-lnternal Aspect of the Maxillary First Permanent 

 Molar in Man. 



TUESDAY, April 25. 



Royal Institution of Great Britain, at 3. — Sir Arthur Keith : 

 Anthropological Problems of the British Empire. Series II. 

 Racial Problems of Africa (1). 



Royal Society of Medicine (Medicine Section) (at Middlesex 

 Hospital), at 5. — Clinical Meeting. 



Royal Statistical Society, at 5.15. 



Zoological Society of London, at 5.30. — Secretary : Report on 

 the Additions to the Society's Menagerie during the month of 

 March 1922.— R. J. Ortlepp : A New Species of the Nematode 

 (Esop/iagostomum from the Rodent Xerus setosus. — Dr. C. F. 

 Sonntag : The Anatomy of the Drill (Mandrillus leucophcBus). — 

 Dr. R. Broom : The Persistence of the Mesopterygold In certain 

 Reptilian Skulls. — A. Loveridge : New Reptiles from Tanganyika 

 Territory. 



Institution of Civil Engineers (Annual General Meetlngi, at 6. 



Royal Photographic Society of Great Britain (Annual Genera! 

 Meeting), at 7 ; at 7.30.— Dr. T. S. Price : Gelatine. 



Royal Anthropological Institute, at 8.15. 



Royal Geographical Society (at Queen's Hall), at 8.30.— Lleut.-Col. 

 C. K. Howard-Bury : The Mount Everest Country and People. 



WEDNESDAY, April 26. 



Royal Institution of Great Britain, at 3. — Prof. D.'H. MacGregor : 



Industrial Relationships (1). The Historical Interpretation. 

 Royal Institute of British Architects (at Olympia), at 6.— Su- 



Lawrence Weaver: Modern Domestic Architecture; Fashion and 



Style. 

 Royal Society of Arts, at 8.— Dr. J. F. Crowley : The Uses and 



Advantages of Electric Power In the Factory, as Illustrated by its 



Application to the Jute Industry.) 



ITRVRSDAY, April 27. 



Royal Institution of Great Britain, at 3. — Prof. E. H. Barton : 

 Audition and Colour Vision (1). The Resonance Theory of Audition. 



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

 Octavla Lewin : The Natural Defences of the Upper Air Passages. 



Institution of Electrical Engineers, at 6. — J. A. Kuyser: Pro- 

 tective Apparatus for Turbo- Alternators. 



Concrete Institute (Annual General Meeting), at 7.30.— W. N. 

 Twelvetrees : Reinforced Concrete Piers and Marine Works. 



Optical society (at Imperial College of Science and Technology, 

 South Kensington, S.W.7), at 7.30.— Prof. A. Pollard: The 

 Mechanical Construction of the Microscope, from a Historical 

 Standpoint. 



Oil and Colour Chemists' Association (at Food Reform Club, 

 2 Furnival Street, W.C.I).— F. H. Jennlson : Studies of Precipita- 

 tion. 



Illuminating Engineering Society (at Royal Society of Arts), at 

 8. — Discussion on the Use of Light in Hospitals (including the 

 illumination of hospital wards and operating-tables and some other 

 applications of light). 



Harveian Society (at Town Hall, Paddington), at 8.30.— Discussion, 

 by Sir Humphry BoUeston and others, on Influenza. 



Royal Society of Medicine (Urology Section), at 8.30.— J. Swan 

 and others : Tests of Renal Function. 



FRIDAY, April 28. 



Zoological Society of London, at 4. — Anniversary Meeting. 



Royal Society of Arts (Indian Section), at 4.30. — F. G. Royal 

 Dawson : The Need of an All-India Gauge Policy. 



Physical Society of London (at Imperial College of Science and 

 Technology), at 5. — T. Smith : The Position of Best Focus in the 

 Presence of Spherical Aberration. — F. Twyman and J. Perry: Ihe 

 Determination of the Absolute Stress-variation of Refractive Index. 

 — C. J. Smith : An Experimental Comparison of the Viscous Properties 

 of (a) Carbon Dioxide and Nitrous Oxide, and (Jb) Nitrogen and Carbon 

 Monoxide. — F. Twyman : Demonstration of the Optical Sonometer. 



Royal College of Surgeons of England, at 5. — Sir Arthur Keith : 

 Demonstration of Museum Specimens illustrating the Forms of 

 Inguinal Hernia. 



Royal Society of Medicine (Study of Disease In Children Section), 

 at 5. — Sir Robert Jones : Presidential Address. 



Institution of Mechanical Engineers, at 6.— Prof. E. G. Coker 

 and Dr. K. C. Chakko : An Account of some Experiments on the 

 Action of Cutting Tools. 



Royal Society op Medicine (Epidemiology Section), at 8. — Dr. F. 

 Dittmar : Outbreaks of Enteric Fever associated with Carrier 



Royal Institution of Great Britain, at 9.— Dr. A. Harden • 

 Vitamin Problems. 



PUBLIC LECTURES. 



{A number in brackets indicates th-e number of a lecture in a series.) 



WEDNESDAY, April 26. 

 Univf.rsity College, at 5.15.— Dr. D. H. Scott : The Eariy History 

 of the Land Flora (1). 



THURSDAY, Amiz 27. 

 University College, at 5.15. — Sir Joseph J. Thomson : Atoms, 

 Molecules, and Chemistry (1). — A. T. Walmlsley : The Bridges over 

 the River Thames at London. 



FRIDAY, Aprh. 28. 

 Bedford ColI;EGE, at 5.15.— Prof. E. Claparfede : L'iDtelligence et 



la Volont6 (1). (In French.) 

 King's College, at 5.50. —Dr. J. Hjort: Biological Aspects of 



Oceanography (1). 



CONTENTS. 



British Dyestuffs Industry 



Sexual Life and Marriage among Primitive Man 

 kind. By Dr. B. Malinowski .... 



Some Chemical Treatises . 



Formal and Philosophical Aspects of Logic 



Terrestrial Magnetism in the Antarctic 



The Analysis of Drugs. By T. A. H. 



South African and Indian Floras 



Science of Industrial Psychology 



Glacial Climates. By G. A. J. C 



Our Bookshelf 



Letters to the Editor :— 



Mind.— Sir G. Archdall Reid, K.B.E. . 



Pencil Markings in the Bodleian Library. — C 

 Ains worth Mitchell 



Haloes and Earth- History : A New Radioactive 

 Element.— Prof. J. Joly, F.R.S. 



The Helmholtz. Theory of Hearing.— Prof. E. W. 

 Scripture 



Boyle's Experiments on Capillarity. — Sidney Skinner 

 Problems in the Variability of Spectra. By Prof 



T. R. Merton, F.R.S 



Mathematics and Public Opinion. By G. B. M 

 Applications of the Thermionic Valve, By J. Joseph 

 Obituary :— 



Prof. Philippe A. Guye. By Sir T. E. Thorpe, 

 C.B., F.R.S 



Prof. W. B. Bottomley. By R. R. G. 



Dr. H. N. Dickson, C.B.E. By H. R. M. 



Current Topics and Events 



Our Astronomical Column : — 



The .Shower of Lyrids 



The Position of Neptune's Equator .... 



Determination of Star Magnitudes by a Thermopile . 



Research Items 529 



A Unique Long-period Variable Star. {Illustrated.) 



By Major W. J. S. Lockyer 530 



Marine Invertebrates 530 



Water-power Resources of India . . . -531 



University Pensions 531 



University and Educational Intelligence . 532 



Calendar of Industrial Pioneers 533 



Societies and Academies 533 



Official Publications Received 535 



Diary of Societies 536 



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NO. 2738, VOL. 109] 



