78o 



NATURE 



[February io, 192 i 



C. Jakeman : The Measurement of Steam Temperaturce. — The 

 Hotwire Microphone: Major W. S. Tucker: The Function of 

 the Convection Current in the Hot-Wire Microphone. — Capt. 

 E. J. Paris : Theory of the Tucker Microphone.— Anemometry 

 and Heat Convection : Prcf, J. T. McGregor Morria ; A Hot-Wire 

 Anemometer. — Dr. J. S. G. Thomas . A Directional Hot-Wire 

 Anemometer. — A. H. Davis : An Instrument for Measuringr Con- 

 vected Heat.— Miscellaneous Applications: Dr. G. A. Shakspear : 

 A Gas Perraeameter. — Prof. Leonard Hill : The Caleometer. — 

 E. A. GrifBths: Liquid Depth Gauije (Distant Reading Type).— 

 Dr. Daynes : A CO2 Eeoorder.— Dr. E. Griffiths : Electrical 

 Hygrromoters. 



Mo.NTESsoKi SocTETT (at Univer.sity CoUes-e), at 5.45.— Miss M. 

 Drummond : The Psychological Basis of the Mnntessori Method. 



Junior Institution or Enoinkkrs (at Caxton Hall), at 8. — F. A. 

 Simpson : Some Limit Gauges. 



Institute or Isdustbiai. Administration (at Central Hall, West- 

 minster), at 8.— Sir Lynden Maoasscy : Prcsent-Day Industrial 

 Psychology. 



ROTAI. SociETl or :>rKDlciNE (Ophthalmology Section), at 8.30.— B. T. 

 Lang : Scotomctry.— Dr. T. H. Butler : Late Infections after 

 Sclereetomy.— M. L. Hephurn : Some Notes on Trephining. 



BoTAi. Ixstitution or Ohfat Britain, at 9.— Dr. F. W. Aston : 

 Isotopes and Atomic Weights. 



SATimHAY, Fkbruaet 12. 

 BoTAi Institution of Great Britain, at 3.— Prof. A. Fowler : 



Spectroscopy (Experimental Spectroscopy). 

 Physioi.ooii-ai. SocjETt (at National Institute for Medical Research, 



Mount Vernon, Harapstead), at 4. 



3/OiVD.ir, Febhuart 14. 

 BiocHBUiCAL SociETi (at University College). 

 RorAL COLLEGE Or SuKOEONs OF ENGLAND, at 4.— Sir Charters J. 



Symonds : Hunterian Oration. 

 INSTITUTE OF ACTUARIES, at 5.— P. A. A. Mcnzlcr : The Census of 



1921 : Some Remarks on Tabulation. 

 KoTAL Geographical Society (at Lowther Lodge), at 5.- Lt.-Col. 



E. A. Tandy ; The Circulation in the Earth's Crust. 

 Institution of Electrical Engineers (Informal Meeting) (at Char- 

 tered Institute of Patent Agents), at 7. 



Institution of Mechanical Engineers (Graduates' Special Lecture), 



at 7. — Sir John Dewrancc : Generation of Steam. 

 RoTAL Institute of British Architects, at 8.— W. E. Willink : 



The Cunard Building. 

 RoTAL SociF.TT OF ARTS, at 8.— Dr. E. K. Rideal: Applications of 



Catalysis to Industrial Chemistry (Cantor Lecture). 

 Medical Society of London (at 11 Chandos Street, W.l), at 8.30.— 



Sir James Galloway and Others : Discussion on Skin Disease : 



Its Holntion to Internal Disorder. 

 Royal Society of Medicine (War Section), at 9. 



rVESBAY, Febeuart 15. 



Royal Society of Medicine (Therapeutics and Pharmacology Sec- 

 tion), at 4.30.— Dr. J. H. Burn: A Comparison of Digitalis 

 Tinctures by Different Physiological .Methods.- Dr. P. Hamill : 

 Pituitary Extracts given by the Mouth (j;xperimcntal).— Dr. 

 Donaldson : Pituitary Extracts given by the Mouth (Clinical). 



RorAL SOCIETY or .Medicine, at 5.— General Meeting. 



Royal Statistical Society, at 5.15.— Dr. J. Bonar : The Mint and 

 the Precious Metals in Canada. 



Institution or Petroleum Technologists (at Royal Society of 

 Arts), at 5.30. — P. de Charabricr : Working Petroleum by means 

 of "Pits" and "Galleries." 



WEDNESDAY, February 16. 

 Royal College of Surgeons of England, at 5.— Dr. F. W. Edridge- 



Green : The Cause and Prevention of Myopia (Arris and Gale 



Lecture). 

 Royal Society op Arts, at 8.— Dr. W . Cramp : Pneumatic Elevators 



in Theory and Practice. 

 Royal Meteorological Society, at 8.— AL dc Carle S. Salter : A 



New Method of Constructing Average Monthly Rainfall Maps.— 



G. A. Clarke : An Unusual Pilot-balloon Trajectory. 

 Royal AIicroscopical Society, at 8. 

 Hunterian Society (at Sion College), at 9.— Dr. H. H. Bashford : 



The Ideal Element in Medicine. 



THURSDAY, February 17. 



Royal Institution of Great Britain, at 3. — Prof. W. A. Herdman : 

 Oceanography (The Sea-Fisheries). 



Royal Society! at i.'M.— Probable Papers.— Dr. C. Chree : A Com- 

 parison of Magnetic Declination Changes at British Observatories. 

 — Prof. H. yi. ifacdonald : The Transmission of Electric Waves 

 Around the Earth's Surface.- Prof. T. H. Havelock : The Stabilitv 

 of Fluid Motion.— Prof. W. H. Young : The Transformation o'f 

 Integrals.— J. L. Haughton and Kathleen E. Bingham : The 

 Constitution of the Alloys of .Aluminium, Copper, and Zinc 

 containing High Percentages of Zinc. 



Royal College of Physicians of London, at 5.— Dr. Martin Flack : 

 Respiratory Efficiency in Relation to Health and Disease (Milroy 

 Lecture). 



LiNUEAN Society, at 5.— Prof. G. ^B. De Toni : A Contribution to 

 the Teratology of the Genus Datura.— Capt. J. Ramsbottom and 

 A. J. Wilmntt: A Plant Collection from Macedonia.— t)r. G. C. 

 Druoe : Shetland Plantago and Other Plants from the Northern 

 Isles. 



Royal Aeronautical Society (at Roval Soeietv of Arts), at 5.30.— 



F. Handley Page : The Handler Page Wing. 



Institution of JIinino and Metallurgy (at Geological Society), 

 at 5.30.— E. H. Clifford : A Scheme for Working the City Deep 

 Mine at a Depth of 70O0 ft. 



iHSTiTUTiox or ElECTBicu. EsoiHttu (st Inatitutios of Civil 

 Engineers), at 6. — Prof. E. Wilson: Ma^netio Susceptibility of 

 T,ow Order : I. Instrumentation. 



Institution or Autouobile Knuineeks (Ixindon Graduates' Meet- 

 ing) (at 2H Victoria Street), at 7.30.— E. L. Bast: Engine 

 Lubrication. 



Cheuical Societt, at 8.— L. J. Hndleston and H. Bassett : Equilibria 

 of Hydrofluosilicio Acid. Part I. Mixtures of Hydroflnosilioio 

 and Hydrofluoric Acids. — R. O. Fargher and H. King: Additive 

 Compounds of Antipyrylamlnodiaectic Acid and its Salts with 

 Neutral Salts.- H. Bassett and T. A. Simmons : The System, 

 Picric Acid — Phenyl Acridine. — F. 8. Kipping : Organic Deriva- 

 tives of Silicon. Part XXIV. df-Dcrivatives of Bilicoethanc. — 

 F. W. Ataok : The Structural Isomerism of Oiimes. Part I. 

 Criticism of the Hantzsch-W'erner Hypothesis of the Geometrical 

 Isomerism of Carbon-Nitrogen Compounds.- F. W. Ataok : Th« 

 Structural Isomerism of Oximes. Part II. Constitution of Oiimej. 

 — P. 8. Kipping : Organic Derivatives of Silicon. Part XXV. 

 Saturated and Unsaturated Silicohvdrocarbons Si4Pli^, 



ROnioen Society (at University College), at 8.15.— N. E. Luboshei: 

 Intensifying Screens and Secondary Radiation. 



FRIDAY, Februaby 18. 



.\ssociation or Econoutc Biologists, Annual Genera] Meeting 

 (in Botanical Lecture Theatre, Imperial College of Science), at 

 2.30. — Sir David Praia : Some Relationships of Economic Biology. 



Geoix)oical Society of London, at 3. — .\nniv?r8ary Meeting. 



Royal Society or Arts (Indian Section), at 4Jd. 



Royal College of Surgeons of Engmnd, at 5. — J. F. Dobson : The 

 Function of the Kidneys in Enlargement of the Prostate Gland 

 (Arris and Gale Lecture). 



Institution of ilrcHANlcAi Enoinef.es, at (!.- Annual General Meet- 

 ing. — F. M. Farmer : The Desirabilitv of Standardisation in the 

 Testing of Welds. 



Institution or Electeical Engineers (Stadents' Section) (at King's 

 College. Strand), at 6.30.— L. B. Atkinson : Presidential Address. 



Royal Institution of Great Beitain, at 9.-8. J. Solomon : Strategic 

 Camouflage. 



SATURDAY. February 19. 



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

 Spectroscopy (Regularity in Spectra). 



CONTENTS. PAGE 



The Promotion of our Optical Industries .... 749 



British Mammals ... 751 



Improvement of the Race ... . 752 

 The First Great Alpine Traveller. By Prof. T. G. 



Bonney, F.R.S . -753 



X-Ray Analysis and Mineralogy. By A. E. H. T. j^i 



Our Bookshelf ... 755 

 Letters to the Editor: — 



Flint Implements from the Cromer Forest Bed. 

 (Illu.<:trated.) —J. Reid Moir ; Sir E. Ray 



Lankester, K.C.B., F.R.S 75* 



Modern P.-lss and Honours Degrees. — Sir Oliver 



Lodge, F.R.S. . . 757 



Heredity and Biological Terms. — Sir H. Bryan 



Donkin . 758 



The Scientific Glassware Industry — T Lester Swain 759 



Greenland in Europe. — David MacRitchie . . 759 



The Mild Weather. — Chas. Harding .... 759 



The Leader Cable System. (Illustrated.) 760 



Lake Victoria and the Sleeping Sickness. {l//us- 



tyated) By F. A. D. .... 762 

 Industrial Research Associations. IX. British 

 Boot, Shoe, and Allied Trades Research Asso- 

 ciation. By John Blakeman 763 



Obituary : — 



Dr. J C. Cain. By J. F. T. 765 



Charles Edward Fagan, C.B E , I.S.O. By Sir 



Sidney F. Harmer, F.R.S. 766 



C. Simmonds 767 



Notes .... 768 

 Our Astronomical Column : — 



Interesting Binary Stars 772 



The Green Kay or Flash 772 



Applied Entomology . 773 



Food and its Preservation. Bv W. M. B 774 



The Older Palaeolithic Age in Egypt 774 



Tides in Small Seas. ByJ. P 775 



Paris Academy of Sciences : Loutreuil Foundation 775 



University and Educational Intelligence 776 



Calendar of Scientific Pioneers 777 



Societies and Academies .... 778 



Books Received 779 



Diary of Societies 779 



NO. 2676, VOL. 106] 



