492 



NATURE 



[December 9, 1920 



IlovAi. AsTHONOMKAl, Soc'iKTi, at 5.— J. K. t'othoringhani : A Solu- 

 tion of Ancient Kclipscs of the- Sun.— \V. H. Wright: Tin- Dis- 

 placomentB of the Hydrogren Absorption Lines in the Spectrum 

 of Nova Oeminorum in March, 1912. with lUinarlis upon thi ir 

 interpretation.— H. C. Plummer ; The Question of Statio.mry 

 Radiants. — Rev. J. G. Hayen : A Map showing Obscure Nebulse 

 and their Situation towards the Jlilky Way.— P. H. Hepburn, 

 M. A. Ainslie, W. H. Steavenson, and H. L. Waterfteld : Observa- 

 tions of Saturn, 1920, November 6 to November 20.— C. D. I'cr- 

 fine ; Cepheid Variution : .\clcnowledging ft Correction and .Some 

 Further Considerations. — C. D. Terrine : Behaviour of Radiations 

 at AA ^Sai-^l and at \ 4654 in the Wolf-Rayet Stars.— C. U. 

 Perrine : Presence of Emission at w -4634 and 4tt41 in the Spectra 

 of the Wolf-Kayet Stars. 



Phtsical SociETr or Lqxdon, at 5. — J. St. Vincent Pletts : Some 

 Slide Rule Improvements. — N. A. Allen ; The Current Density 

 in the Crater of the Carbon Arc— F. H. Newman : A Sodium 

 Vapour Electric Discharge Tube. — F. H. Newman : Absorption of 

 Oases in the Electric Discharge Tube. 



RoiAL SocicTT or MiDiciNi (Clinical Section), at 5.30. 



IssTiTOTioN or Mkchanical Enoikeibs (Informal Meeting), at 7. 



TecHNicAt Inspection Association (at Royal Society of kr\i), at 

 7.30.— Dr. O. H. Gulliver : Some Features of Tensile Fractures. 



RoTAL SociKT or Medicine (Ophthalmology Section), at 8.30. 



UOTiBAY, Decembee 13. 



HovAl GtoanAPHiCAL Society (at Lowthcr Lodge), at 5.— L».-Coludr. 

 R. T. Gould ; The History of the Chronometer. 



llovAL SOCIETY OF MEDICINE (War Scctiou), at 5.30. — Surg.-Comdr. 

 E. L. Atkinson : Snow Blindness : Its Prevention, Cause, and 

 Treatment. 



iNsiiTCTios or EiECTBicAL Enoineebs (at Chartered Institute of' 

 Patent Agents, Staple Inn Buildings), at 7.— W. J. Jlinton and 

 Others: Discussion on (1) Percentage and Accuracies; (2) Meter 

 Constants and Standards ; (3) Name-plates. 



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

 —A. G. Hopking: Die Casting. 



RoiAL INSTIICTE OF Bbitish Ahchitects, at 8.— M. S. Briggs: 

 Saracenio Architecture in Egypt and Palestine. 



HoTAL SociKTl or Arts, at 8.— A. Chasten Chapman : Micro- 

 organisms and Some of their Industrial Uses (Cantor Lecture). 



Institote of Brewing, at 8.— H. Lloyd Hind: The Reconstruction 

 , of French Breweries. 



Chemical Inuustri Club, at 8.— Dr. W. R. Ormandy and Others : 

 Discussion on Phosphorescence and Invisible Light. 



SURTEIOHS' I.NSTITCTION, at 8.— F. H. A. Hardcastle : The Work 

 of the Measuring and Quantity Surveyor, and the Use and Abuse 

 of Bills of Quantities. 



Fabadat Societt (at Chemical Society), at 8.— Annual General 

 Meeting.— At 8.15.— Prof. E. D. Campbell : A Force Field Dissocia- 

 tion Ihcory of Solution applied to Some Properties of Steel 

 (Discussion to he opened bv Dr. A. E. Oxlev).— A. L. Norburv • 

 The Electrical Resistivity of Dilnte Metallic Solutions.— W. E. 

 Hughes : The Forms of Electro-deposited Iron and the Effect 

 of .\cid upon its Structure. Part I. Deposited from the Chloride 

 Bath. 



TlIES^Ti.KY, December 14. 



ROIAI HOBTICILTOEAI SocIETT, at 3. 



HoTAi, SociETi or MEDICINE (Therapeutics and Pharmacology Sec- 

 tion) (at Mount Vernon Hospital), at 4.30.— Dr. W. E'. Dixon • 

 Quinine Derivatives as Local Aniesthetics.— Dr.. O. Inchlev • \b-, 

 sorption ef Drugs by means of the Electric Current.— Dr." W. E. 

 'l'^™".,""? '''■■ •'■ '^o"' • -Actions of Isomeric Methyl Chlorides 

 of Tellurium. 



ROTAI. SOCIETT or Medicine (Medicine Section) (at London Hos- 

 pital!, at 5.— D. Hunter: The Results of Fractional Test Meals 

 on Patients. 



ROTAL Statisticai Societt, at 5.15. 



INSTITITION OF Peteoi.ecm TECHNOLOGISTS (at Royal Society of 

 Arts), at 5.30.— Capt. P. W. Mangin : Boring iii Palestine".— F. 

 Esllng : Estimation of Sulphur bv the Lamp Method 



Imtitction of Civil Engineers, at .-,.30.— Sir Robert A. Hadfield. 

 Bt., and S. A. Main : Notes on the .Standardisation of Shock 

 Tests, and Discussion on this Paper and on the three Papers 

 on Notched-Bar Tests read at the Meeting on Novembel 30 



Royal Photographic Societi of Great Britain at 7 



Quekett JIicroscopical Clvb (at 11 Chandos Street. W.l), at 7.30 



Iluminatinc, Engineering Society (at Roval Soeietv of Arts), at 

 8.— Report on Progress during the Vacation, and "an Exhibition 

 of New Developments in Lamps and Lighting Appliances, 

 Illuminatinn-pliotometers. etc. 



RoTAi Anthropological Insiitcte, at 8.13.— Capt. L. W. G. Mal- 

 colm : The Ethnography of the Central Cameroons. 



lIEDiVE.S'D.ir, December 15. 



SOCIETY or GLA.SS Technology (at Royal Society of Arts), at 2.30.— 

 W. A. Whatmough : The Re-Anneating of Glass.— Dr. C. J. Peddle : 

 The Development of Various Types of Glass. Parts VI.. VII.", 

 VIII., and IX. : Silicate Glasses containing Sodium Oxide, Potass- 

 ium Oxide, and Lead Oxide. 



Optical Society (at National Physical Laboratory), at 3.30.— Dr. 

 J. S. Anderson : Photographic Shutter Testing, Testing of 

 Objectives; Differential Refractometry for Liquids: Immersion 

 Refractometry,— ,1. Guild: Curvature Measurements; Note on 

 Pyramidal Error in Prisms : Note on the Correction.^ for Tem- 

 perature and Atmospheric Pressure in Refraotometrv.— J. Guild i 

 and Miss A. B. Dale : Critical Angle Refractometry.— T. 

 Smith : The Dispersion of Glass and the Determination of 

 Probable Corrections to Observations ; Notes on the Calculation 

 of Multiple-Glass Objectives.— T. Smith and G. Milne : A Re- 

 calculation of the Objectives of Steinhcil and Toit, with addi- 

 tions. 



NO. 2667, VOL. 106] 



Geolooical societi or London, at 5.30.— Dr. T. O. Bosworth : The 

 Tertiary and Quaternary Geology and Tectonics of the Littoral 

 of Pern.— H. Woods: The Fauna of the Tertiary Depoaiti o( 

 Northern Peru. 



Institltion of Electbical Enoineebs (Wirelesa Section) (at In- 

 stitution of Civil Engineers), 'at 6. — Capt. K. C. Trench: Baoxe 

 of Wireless Stations. 



Royal .Micboscopkal Societi (at Mortimer Halla, Mortimer Street), 

 at 7.30. — Conversaaione. — At 8. — Ordinary Meeting. 



Royal Society of Abts, at 8.— Major-Ocn. Lord Lovat : Forestry. 



Institute or Chkuistbi (London and South-East Counties Section) 

 (at 30 Russell Square), at 8. — Annual Meeting. 



Royal .Meteouologkal Society, at 8.— Capt. C. K. M. Douglaa : 

 Temperature Variations in the Lowest Four Kilometres. — A. P. 

 Wainwright : .V New Form of Sunshine Recorder (Meehaniosl 

 Type). — Lt.-Col. .7. E. E. Craster : An Investigation of Biver 

 Flow, Rainfall, and Evaporation Records. 



THURSDAY, December 16. 

 Royal .Veronactical Society (at Royal Society of .Vrts), at 5.30. — 



H. Ricardo : Possible Developments in Aircraft Engines. — A. J. 



Rowledge : The Instalment of Aeroplane Engihes. 

 Institltion of Mining and Metallcboi (at Geological Society), 



at 5.30. — E. .1. Prior : Some Sources of Error in Alluvial Boring. 



— R. E. Palmer: Some Observations on Mining by the Opencast 



or Stripping Method. 

 Institution of Electbical Enoineebs (at Institution of Civil 



Engineers), at 6.— Discussion : Report on the Heating of Buried 



Cables. 

 Institution of .\utouobile Enoineebs (Graduates' Meeting) (at 



28, Victoria Street), at 8.~T. E. B. Whiting: Carburation. 

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



Sir R. Robertson : Lecture : Some Properties of Explosives. 

 ROntoen Society (in Physics Lecture Theatre, University College), 



at 8.15. 



FRIDAY, Decembeb 17. 

 Institution or Mechanical Engineers, at 6. — Dr. W. J. Walker : 



Thermodynamic Cycles in Relation to the Design and Future 



Development of Internal-combustion Motors. 

 RoTAL Society of Arts, at 8.— Col. R. J. Stordy : The Breeding of 



Sheep, Llamas, and Alpacas in Peru, with a view to supplying 



Improved Raw Material for the Textile Trades. 



.'SATURDAY, Decembeb IS. 

 Physiological .Societi (at St. Thomas* Hospital), at 4. 



CONTENTS. PAGE 



The Dye Industry 461 



Evolution of Water Plants. By Dr. H. B. Guppy . 462 



The Behaviour of Beetles 4*3 



Kinetic Theory 4<'5 



A Monograph on Margarine. By Harry Ingle . . . 465 



Our Bookshelf ... ... 4''6 



Letters to the Editor: — 



Name for the Positive Nucleus.— Sir Oliver Lodge, 



F.R.S 467 



The British Association.— Prof. Henry E. Arm- 

 strong, F.R.S. .... . 467 



The Constitution of the Elements.— Dr. F. W. Aston 468 



Solar Variation and the Weather.— H. H. Clayton . 468 

 The Physical Meaning of Spherical Alwrration. 



(Illustrated.)— L,. C. Martin . . 469 



"Phenomena of Materiali.=ation." — Dr. E. E. 



Fournier d'Albe ; The Reviewer 471 



Higher Forestry Education for the Empire. — Editor. 471 

 Automatic Printing of Wireless Messages, {///us- 



traled.) 472 



The New Oilfield of Northern Canada. By W. Joties 474 

 Industrial Research Associations. V. The British 

 Portland Cement Research Association. By 



S. G. S. Panisset 475 



Obituary : — 



Sir William Abney, K.C.B., F.R.S. By Dr. 



A. E. H. Tmton, F.R.S 476 



Notes 477 



Our Astronomical Column : — 



The December Meteors 4^* 



Minor Planets . • 4^2 



Photographic Parallax Determinations at Allegheny . 482 



Migrations of Cultures in British New Guinea . . 483 



International Weather Telegraphy 4S4 



Zoology at the British Association. By Prof. J. H. 



Ashworth, F.R.S . 4S5 



University and Educational Intelligence . . . .' . 4S7 



Societies and Academies 488 



Books Received 49' 



Diary of Societies 491 



