524 



NATURE 



[January 15, 1920 



DIARY OF SOCIETIES. 



THURSDAY, January 15. 



Royal Institution of Greai Britain-, at 3.— Dr. R. R. Terry: 

 Renaissance Music in Italy and England (with Musical Illustrations). 



KoYAl. Society of Arts (Indian Section), at 4.30. 



London Mathematical Society, at 5.— Major P. A. MacMahon : The 

 Divisors of Numbers. — H. Sleinliaus : Fourier Coefficients of Bounded 

 Functions. — S. P. Owen : The Lag of a Thermometer in a Mediumwhose 

 Temperature is a Linear Function of the Time. 



Linnean Society, at 5. — Dr. B. Daydon Jackson: Methods of Botanic 

 Illustration during Four Centuries (Lantern Lecture). 



Royal Institute of Public Health, at 5.— Prof. E. W. Hope : Schemes 

 :tnd Methods in Tuberculosis Work. 



Chemical Society, at 8.— L. E. Hinkel and H. W. Cremer : The Con- 

 densation of Acetoacetic Ester with /*-Dimethylaminobenzaldehyde and 

 Ammonia.— G. S. Butler and H. B. Dunnichff: The Action of Alcohol on 

 theSulphates of Sodium. — M. Nierenstein, C. W. .Spiers, and, in part, the 

 late K. _C. R. Daniel: Guarana Tannin. — R. Lessing : Studies in the 

 Composition of Coal : (i) The Behaviour of the Constituents of Banded 

 Bituminous Coal on Coking ; (2) The Mineral Constituents of Banded 

 Bituminous Coal.— P. Ray and P. V. Sarkar ; The Hydralino-thio- 

 cyanates of certain Divalent Metals. 



FRIDAY, January 16. 



Institute of Aeronautical Engineers (at the Holborn Hall), at 2.30. 

 '^Prof. G. H. Bryan: Presidential Address. 



Royal Society or Meoicine (Otology Section), at 5.— Dr. A. A. Gray : 

 A Few Anatomical Details of the Anatomy of the Vestibule, not pre- 

 viously described. 



Institution of Civil Engineers (Students' Meeting), at 6.— R. B. 

 Dunwoodyr The Economic Requirements for Inland Navigation Trans- 

 port in the British Islei (Vernon Harcoiirt Lecture). 



Institution OK Electrical Engineers (Students' Meeting) (at the City 

 and Guilds (Engineering) College), at 7.— J. H. Reyner : The Develop- 

 ment of Automatic Telephony. 



Junior Instiiution of Engineers (at 39 Victoria Street), at 7.30.— 

 H. E. D. Kilbuni : Meteorology and Engineering. 



Royai, Society of Medicine (F-Iectro-Therapeutics Section), at S.30.— 

 C. Thurstan Holland : Lessons of the War. 



Society of Troitcal Medicine and Hygiene, at 8.30.— Dr. P. Manson- 

 Bahr and Others : Discussion on Bacillary Dysentery-. 



Royal Institution of Great Britain, at 9.— Prof. Sir James Dewar : 

 Low Temperature Studies. 



SATURDAY, January 17. 



Royal Instiiution of Great Britain, at 3.— A. Noyes : The Anglo- 



, American Bond of Literature. 



MONDAY, January 19. 



Victoria Institute (Committee Room B, Central Hall, Westminster), 

 at 4.30.— Dr. A. T. Schofield : The P.sychology of the Female Mind. 



Royal College of Surgeons, at 5.— Prof. A. Keith : John Hunters 

 Observations and Discoveries in Anatomy and Surgery ; His Contribu- 

 tions to our Knowledge of the Heart and Blood Vessels (Hunterian 

 Lecture). 



Institution ofElectricalEnginf.ers (Informal Meeting) (at Chartered 

 Institute of Patent Agents), at 7.— S. M. Hills and Others : Discussion on 

 Functions of a Trade Journal. 



Surveyors' In.stitution (Junior Meeting), at 7. — R. E. A. Dash : The 

 Housing Question and how it is affected by Recent Regulation. 



Aristotelian Sociirrv (at 74 Gro-svenor Street), at 8.— Prof J. A. Smith : 

 The Philosophy of Giovanni Gentile. 



Royal Society ok Arts, at 8.— Capt. H. Hamshaw Thomas: Aircraft 

 Photography in War and Peace (Cantor Lecture). 



Royal Geographical Society (at ^lEolian Hall), at 8.30.— Lt. -Col T 

 Tilho : Tibesli to Darfur. '.J J- 



TUESDAY, January 20. 

 Royal Institution of Great Britain, at 3.— Prof. Sir John Cadman : 



Modern Development of the Miner's Safety Lamp. 

 Royal Society of Medicine (Therapeutics and Pharmacology Section), 



at 4.30 —J. Barcroft and Others : Discussion on the Therapeutic Uses of 



Oxygen. 



Royal Statistical Society, at 5.15.— G. H. Knibbs: The Organisation 



of Imperial Statistics. 

 MiNERALOGicAL SociETY, at 5.30.— Dr. E. S. Simpson : Gearksutite at 



Gingin, Western Australia.— C. E. Barrs : Fibroferriie from Cyprus.— 



Dr. G. T. Prior : The Classification of Meteorites.— A. F. Hallimond ' 



On Torbernite. 

 iNsriTUTioN OP Petroleum Technologists (at Royal Society of Arts) 



at 5.30.— H. Moore : Spontaneous Ignition Temperatures of Liquid Fuels' 

 Royal Photographic Society of Great Britain (Technical Meeting) 



at 7.— T. H. B. Scott : Pictorial Suggestions. 



WEDNESDAY. January 21. 

 Royal Society of Arts, at 4.30.— A. H. Powell: Ancient Cotta»es and 



Modern Requirements. 

 Royal Meteorological Society (at the Royal Astronomical Soc-ety) 



(Annual General Meeting), at 5.— Sir Napier Shaw : Pioneers in the 



Science of Weather (Presidential Address). 

 Royal Society of Medicine (Occasional Lecture), at 5.— Surg -Conim 



K. Digby Bell : The Position of the Medical Profession with regard to 



National Physical Education, 

 Royal College of Surgeons, at 5.— Prof. A. Keith: John Hunter's 



Observations and Discoveries in Anatomv and Surgery : His Contribu- 

 tions to our Knowledge of the Lungs and Pleu.ae (Hunterian Lecture) 

 liFOLOGicAL .Society of London, at 5.30. 

 Royal Aeronautical Socirty (at the Royal Society of Arts) at 8 — 



.\. P. Cole : Principles of Rigid Airship Construction. ' 



Royal Microscopical Soch-ty (Annual Meeting), at 8.— J. E Barnard ■ 



The Present Status of Microscopy (Presidential Address). 

 THURSDAY, January 22. 

 Royal Institution of Great Britain, at 3.— Dr. R. R. Terry- 



Renaissance Music in Italy and England. 

 Royal Society, at 3.30 (Special Geneml Meeting). At 4.30.— Prof. E. G 



Coker and K. C. Chakko : The Stress-strain Properties of Nitro-cellulose 



NO. 2620, VOL. IO4I 



and the Law of its Optical Behaviour. — S. Marsh : Alternating-Current- 

 Eloctrolyeis. — W. H. Eccle^ and J, H. Vincent : The Variations of Wave- 

 length of the Oscillations Generated by the Three-Electrode ' hermionic 

 'iube due to Changes in Filament Current, Plate Voltage, Grid Voltage, or 

 Coupling, — S. D. Carothers ; Plane Strain. The Direct Determination of 

 Stress. — F. Horton and Ann C Davies : An Investigation of the Effects 

 of Electron Collisions with Platinum and with Hydrogen, to ascertain 

 whether the Production of lonisation from Platinum is due to Occluded 

 Hydrogen. ~L. Bairstow. R, H. Fowler, and D. R. Harrree.— The 

 Pressure Distribution on the Head of a Shell moving at High Velocities. 



Institution OF Mining and Metallurgy (at the Geological So' iety). 

 at 5.30 — W. Broadbridge : Froth Flotation : Us Commercial Application 

 and its Influence on Modern Concentration and Smelti >g Practice, 



Institution of Electrical Engineers (at the Institution of Civil 



Engineers), at 6. — J. L. Thompson : Transformers for Electric Furnaces. 



FRIDAY, January 23. 



Physical Societv of London (at the City and Guilds Technical College, 

 Leonard Street), at 5. — I>r. J. H. Vincent: Maintained Oscillations in 

 Triode Valve Circuits. — Dr. W. Eccles : Measurements of the Chief 

 Parameters of Trtode Valve.*:. — F. W. Jordan: Measurement of Ampli- 

 fication of a Radio-frequency Amplifier. — F. E. Smith: The Measure- 

 ment of Amplification given by Triode Amplifiers at Audible and at 

 Radio Frequencies. — Hon. C. W. Stopford and C. R. Darling ; Exhibi- 

 tion of a Method of Deteimining the Hardening Temperature of Steel. — 

 C. R. Darling : Exhibition of a Thermal Cell of Constant Voltage. 



Royal College of Surgeons, ai 5. — Prof. A. Keith : John Hunter's 

 Observations and Discoveries in Anatomy and Surgery; His Contribu- 

 tions to our Knowledge of the Alimentary System (Hunterian Lecture). 



Institution of Mechanical Engineers, at 6. — E. M. Bergstrom : 

 Recent Advances in Utilisation of Water Power. 



Royal Society of Medicine (Epidemiology and State Medicine Section), 

 at 8.30. — Dr. F. G. Crookshank : Principles of Epidemiology.— Dr. 

 Cleland and Dr. Campbell : Epidemiology of Acute Encephalomyelitis. 



Royal Institution of Great Britain, at 9.— Hon. Sir Charles Parsons : 

 Researches at High Pressures and Temperatures. 

 SATURDAY, January 24. 



Royal Institution of Grrat Britain, at 3. — A. Noyes : Aspect; of 

 Modern Poetry. 



Physiological Society (at Kings College), at 4. 



CONTENTS. PAGE 



Surgery and Deformities 493 



The Oil-hardening Industry. By E. F. A 494 



Political Science. By Rt. Rev. Bishop J. E. C. Welldon 494 



American Books on Agriculture 495 



Handbooks of Chemistry. By C. J \<)^ 



Fresh-water Biology 498 



Our Bookshelf 499 



Letters to the Editor :— 



Promolion of a Plumage Bill. — Prof. J. E. Duerden 499 

 Musical Drums wiih Harmonic Overtones. (Illus- 

 trated.) — Prof. C. V. Raman and Sivakali Kumar ;;oo 

 Power from the Sun. — Alfred S. E. Ackermann tjoo 

 Triode Valves as Electric Amplifiers. {Illustrated.) 



By Prof. W. H. Eccles . 501 



Indian Geology. (Illustrated.) By T. H. D. L. . . 502 

 Meteorology m Three Dimensions. By Lt. -Col. 



E. Gold 505 



Sir Thomas R. Eraser, F.R.S. By J. A. G 505 



Notes . .... 506 



Our Astronomical Column : — 



Spectroscopic Determination of Stellar Parallax . . . 511 



Minor Planets . . 511 



Lunar Photography with the loo-in. Reflector . . .511 



Prize Awards of the Paris Academy of Sciences . . 512 



Educational Conferences 513 



The Physical and Optical Societies' Exhibition. B 



By D. 514 



The Charters Towers Goldfield 515 



The New Zealand Science Congress, igig ... 516 

 The Afiican Rift Valley. By Prof. J. W. Gregory, 



F.R.S 518 



Physiology at the British Association 519 



Botany at the British Association. By E. N. T. 520 



Education at the British Association' 521 



University and Educational Intelligence 523 



Societies and Academies 523 



Books Received 523 



Diary of Societies . . 524 



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