852 



NATURE 



[February 24. 1921 



Diary of Societies. 



THURSDAY, FEancARi 24. 



Medico-Pstchological Association oi Great Bbitain and Ireland 

 (at 11 Chandos Street, W.l), at 2.45. — Sir Frederick Mott and 

 Dr. Hayao : The Pathology of Dementia Prreoox, espeoially in 

 Relation to the Condition of the Ovaries. 



RorAL Institution of Great Britain, at 3. — F. Balfour Browne : 

 Mason Bees and Wasps. 



Royal Societt, at 4.30.— Sir Bay Lankester : A Remark- 

 able Flint-implement from Selsey Bill. — Dr. E. J. Allen ; 

 Regeneration and Reproduction of the Syllid Procerastea. — E. C. 

 Grey and E. G. Young : The Enzymes of B, colt communis. 

 Part II. (o) Anaerobic Growth followed by Anaerobic and Aerobic 

 Fermentation, (b) The Effects of Aeration during the Fermenta- 

 tion.— Dr. A. E. Everest and A. J. Hall : Anthocyanins and 

 Anthocyanidins. 



RorAL Societi or Medicine (Tropical Medicine Section), at 5.— 

 Sir Leonard Rogers : Presidential Address.— Dr. J. G. Thomson 

 and Dr. A. Robertson : The Value of Laboratory Reports in the 

 Diagnosis of Suspected Dysentery, and their Interpretation by 

 the Clinician. 



BoTAL College of Phtsicians of London, at 5.— Dr. Martin Flack: 

 Respiratory Efficiency in Relation to Health and Disease (Milroy 

 Lecture). 



Institctiox or Electrical Engineers (at Institution of Civil 

 Engineers), at 6.— Prof. E. Wilson: Magnetic Susceptibility of 

 Low Order. II. Susceptibility Values. 



Concrete Institute, at 7..30.— E. S. Andrews : Methods of Securing 

 Impermeability in Concrete. 



iLLrjilNATiNO Engineering Society (at Roval Societv of Arts), at 

 8.— Discussion : The Use of Light as an 'Aid to Publicity. 



Royal Society of Medicine (Urology Section), at 8..10. 



FRIDAY, FEBRrARY 25. 



KOYAL Society of Medicine (Study of Disease in Children Section), 

 at 4.30.— Sir Humphry RoUeston and Others : Discussion on The 

 Diagnosis and Treatment of Congenital Syphilis and its Effects. 



Physical Society of London (at Imperial College; of Science), 

 at 5.— T. Smith : Tracing Rays through an Optical System.— 

 .1. Guild : The Refractomctry of Prisms.— R. H. Humphry : 

 A Note on the Hot-Wire Inclinometer.- Profs. E. Wilson and 

 E. F. Herroun : The Magnetic Susceptibilitv of Certain Natural 

 and Artificial Oxides. 



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



Junior Institution or Engineers, at 8.— H. T. Davidge : Measure- 

 ments of Precision in Engineering. 



Royal Society of JIedicine (Epidemiology and Stat« Medicine 

 Sijtion), at 8.30.— Dr. R. M. F. Picken : The Epidemiology of 

 Measles in a Rural and Residential Area. 



SATURDAY, February 26. 

 Royal Institution of Great Britain, at 3.— Prof. A Fowler- 

 Spectroscopy (Celestial Spectroscopy). 



MONDAY, February 28. 



Royal Institute or British Architects, at 8.— Discussion of Pro- 

 fessional Questions. 



Royal society OF Arts, at 8.-Dr. E. K. Rideal : Applications of 

 Catalysis to Industrial Chemistry: Hydrolytio Processes (Cantor 



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

 Janies: Some Clinical Cases Associated with Dental Infection.— 

 P. Cole ; Condition of Two Pedicle Bone Grafts two rears after 

 Operation. 



Medical Society or London (at 11 Chandos Street, W.l) at 8 30 — 



Dr. J. H. Rylfel and Others : The Chemical Estimation of Gastric 



inunction. 



TUESDAY, March 1. 

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



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



Evidence. 



Institute of Chemistry (Annual General Meeting), at 4.30.— Sir 

 Herbert Jackson : Presidential .\ddress. 



Royal College of Physicians op London, at 5.— Dr. G Graham ■ 

 Glyesemia and Glycosuria (Goulstonian Lecture). 



Royal Photographic Society of Great Britain, at ".— J. D 

 Johnston ; A Plain Traveller's Tale, Rome to Naples 



Royal Institute of British Architects, at 8.— Jay Hambidge ■ 

 Further Evidence for Dynamic Symmetry in Ancient Archi- 

 tecture. 



WEDNESDAY, March 2. 



Newcomen Society (at Marconi House), at 5.— L. St. L. Pendred ■ 

 Trevithick's London Locomotive of 1808. 



Society of Pu-blic Analysts and Other Analytical Chemists (at 

 Chemical Society), at 8.— C. Ainsworth Mitchell : The Acidity 

 of Ink and the Action of Bottle Glass on Ink.— G. Van B. 

 Gilmour: The Detection of Adulteration in Butter by Means of 

 the Melting-Point of the Insoluble Volatile Acids.— 8. H. Blich- 

 feldt and T. Thornley : Method and Apparatus for Routine 

 Determination of Melting-Points of Fats and Fatty Acids. 



NO. 2678, VOL. 106] 



ROTAL Institute op British Architects, at 8.— E. Warren : Archi- 

 tectural Impressions of a Recent Tour in Mesopotamia. 



Royal Society or Arts, at 8.0.— Capt. J. M. Hollis : The E«- 

 education of the Disabled. 



Institution or Automobile Engineers (at Institution of Mechanical 

 Engineers), at 8.— Dr. W. H. Hatfield": Automobile Steels. 



THURSDAY, March 3. 



Royal Institution or Great Britain, at 3. — F. Balfour Browne : 



Mason Wasps. 

 Royal Society, at 4.30.— Discussion on Isotopes to be opened by 



Sir J. J. Thomson, followed probably by F. W. Aston, Prof. F. 



Soddy, Prof. T. K. Morton, and Prof. F. A. Lindemann. 

 Royal Aebonactical Society (at Royal Society of Arts), at 5.— 



J. W. W. Dyer: Airship Fabrics.-^Major T. Orde Lees: Para- 

 chutes. 

 LiNNEAN Society, at 5.— R. T. Giinther : A Manuscript of Matthias 



de Lobel, from the Library of Magdalen College, Oxford. — Dr. 



B. Daydon Jackson : Naturalists and their Indebtedness to the 



National Trust. 

 Royal College op Physicians of London, at S.— Dr. G. Graham : 



Glycajmia and Glycosuria (Goulstonian Lecture). 

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



M. V. Buysman : The Value of the Drama in the Training of 



the Child's Emotions. 

 Chemical Society, at 8. 



FRIDAY, March 4. 

 Royal Society of .Vrts (Indian Section), at 4.30. 

 Royal Astronomical Society (Geophysical Discussion), at 5 — 



Problems of Seismology: opened by Prof. H. Lamb, follow.3d 



by Dr. G. W. Walker, R. D. Oldham, and J. J. Shaw. Cha.r- 



man: Prof. H. H. Turner. 

 Royal Astronomical Society (Geophysical Diseassion), at 5. 

 Institution of Electrical Engineers (Students' Meeting) (it 



Faraday House), at 6..30.— A. Rosen: Telephonic Transmissiim 



through Submarine Cables. 

 Royal Institution of Great Britain, at 9 — W. A. Tait : Severn 



Crossings and Tidal Power. 



SATURDAY, March 5. 

 Royal Institution of Great Britain, at 3.— Sir Ernest Ruther- 

 ford : Electricity and Matter. 



CONTENTS. PAGE 



National Aspects of the Fine Chemical Industry . . Szs 

 A Physical Theory of the Universe. By J. W. N. . 822 

 The Methods of Cancer Research. By Dr. J. A. 



Murray 824 



Virgil's Botany. By G. H. W 825 



Our Bookshelf 826 



Letters to the Editor:— 



A Quantum Theory of Vision.— Prof. J. Joly, F.R.S. 827 

 The Constitution of Lithium. — Dr. F. W. Aston 



and G. P. Thomson ... 827 



The Elementary Panicle of Positive Electricity. — 



Prof. Arthur H. Compton 828 



The Peltier Effect and Low-Temperature Research. — 



A. A. Campbell Swinton, F.R.S 82S 



Heredity and Biological Terms.— J. T. Cunningham 828 

 Coloured Thinking. — Frank H. Perrycoste . 829 



The Effects of Oil from Ship.s on Certain Sea-birds. — 

 Dr. Walter E. Collinge . ... ... 830 



The Annular Eclipse of the Sun on April 8. — J. 



Hargreaves 830 



A Rare E.xample of Melanism. — F. W. FitzSimons 8)o 

 French Chemical Industry during the War . . . 831 



VVar-time Archaeology. (Illtistrateit) 834 



The Annular Eclipse of April 8. {With Map.) By 



Dr. A. CD. Crommelin 835 



Obituary : — 



Prof. Emile Bourquelot 836 



Col. R. A. Wauhope. By T. H. H 837 



Notes 838 



Our Astronomical Column : — 



A Study of the Stars of Type N S42 



The Madrid Observatory 842 



PopuKar Astronomy in Sweden 842 



Scientific and Technical Workers in the United 

 States Civil Service. By Major A. G. Church . . S43 



Efficiency in Industry 844 



Human Tails 84? 



University and Educational Intelligence . . 846 



Calendar of Scientific Pioneers 847 



Societies and Academies ... 848 



Books Received S51 



piary of Societies . . 852 



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