32 



NATURE 



[January 5, 1922 



Cfntbai Association foe the Cabe of the Mkntalli Defective (at 

 University College), at 5.^Dr. G. A. Auden : The Pos8ibilit>> of 

 Uo-operation between the School Medical Officer and the Teacher 

 in the Training of Subnormal and Mentally Defective Children. 



London Head Teachers' Association (at University College), at 

 5.30.— D. J. Collar and T. G. Tibbey : Intelligence Tests in 

 Schools. 



RoTAL Aebonatjticai Societi (at Koyal Society of Arts), at 5.30. — 

 Wing-Cmdr. W. D. Beatty : Specialised Aircraft 



Geographical Association (at Birkbeck College), at 5.45.— Lord 

 Robert Cecil : Presidential Address. 



IxsTiTrTiON OF ELECTRICAL ENGINEERS, at 6. — Dr. S. P. Smith : 

 Single and Three-phase Commutator Motors with Shunt and 

 Series Characteristics. 



Physical Society and Optical Society (at Imperial College of 

 Science and Technology), at 8.— A. A. Campbell Swinton : The 

 Johnsen-Rahbek Electrostatic Telephone and its Predecessors. 



Royal Society of Medicine (Obstetrics and Gynecology Section), 

 at 8.— B. Whitehouse : Salpingotomy verm» Salpingectomy in 

 the Treatment of Tubal Gestation.— J. B. Hunter : Short His- 

 tory and Post-mortem Notes of an Interesting Case of Diffuse 

 Carcinoma following Cancer of Cervix.— A. W. Bourne : Hyper- 

 thyroidism in Functional Menorrhagia. 



FRIDAY,_ January 6. 

 Geographical Association (at King's College), at 10.20 a.m.— Dr. 

 Pleure : The Co-operation of Historians and Geographers. 



Geographical Association (at Birkbeok College), at 3.— Miss L. 

 Winchester : Some Climate Problems of Modern Palestine. — At 4. 

 —Dr. Hogarth: The Hedjaz. 



Royal Geographical Society (Christmas Lectures to Young People) 

 (at ^olian Hall), at 3.30.— Sir Francis Younghusband : Pictures 

 from Mount Everest. 



Institution of Mechanical Engineers (Joint Meeting with the 

 Society of Chemical Industry), at 6.— G. M. Gill: The Co-opera- 

 tion of the Engineer and Chemist in the Control of Plants 

 and Processes. 



Junior Institution of Engineers, at 8.— A. E. Bingham : Stone 

 and Marble-working Machinery. 



SATURDAY, January 7. 



College of Preceptors, at 11.30 a.m.— Prof. J. Adams : Psycho- 

 analysis and its Value and Limitations from the Standpoint 

 of the Practical Teacher. 



Royal Institution, at 3.— Prof. J. k. Fleming : Electric Waves 

 and Wireless Telephony : Electric Waves. 



Gilbert White Fellowship (at fi Queen Square, W.C.I), at 3.- 



E. Kay Robinson : British Wild Life. 



MONDAY, January 9. 

 Artstotelt.\n Society (at 21 Gower Street, W.C.I), at 8.— Dr. 



F. C. S. Schiller, C. Joad, and Prof. R. F. A. Hoernl§ : 

 Discussion : Mr. Russell's " Analysis of Mind." 



Royal Institute of British Architects, at 8. 



Surveyors' Institution, at 8. — W. R. Davidge : Problems of 



Greater London. 

 Royal Geographical Society (at JEolian Hall), at 8.30.— Sir Philip 



Brocklehurst : Across Wadai. 



TUESDAY, January 10. 



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

 Electric Waves and Wireless Telephony : Wireless Telephony. 



MiNERALOGiCAL SOCIETY (at Gcological Society), at 5.30.— C. E. 

 Tilley : Density, Refractivity, and Composition Relations of 

 Some Natural Glasses.— A. Russell : Laurionite and Para- 

 laurionite from Cornwall. — W. A. Richardson : A Simplification 

 of the Rosewal Method of Micro-analysis. 



Institution of Civil Engineers, at 6.— A. W. Rendell : Control 

 of Trains in Relation to Increased Weight and Speed combined 

 with Reduced Headway.— Sir Henry Fowler and H. N. Greslcy : 

 Trials in Connection with the Application of the Vacuum- 

 brake for Long Freight Trains. 



Royal Photographic Society of Great Britain (Technical Meet- 

 ing), at 7. — Dr. B. T. J. Glover and others: Discussion: Should 

 the Manufactu'-ers Supply Figures indicating the Contrast 

 Grading of Gas-light and Bromide Papers?— A. F. Kitching : 

 Demonstration of Some Effects with tfltra-violet Light. — The 

 General Electric Co., Ltd. : Developments Rendered Possible in 

 Projection Work by the Introduction of the Osram Gas-fllled 

 Projector Type Lamp. 



Quekett Microscopical Club, at 7.30.— Dr. C. Turney : Mosquito 

 Investigation. 



ROntgen Society (at Institution of Electrical Engineers), at 8.15. 

 — Prof. A. O. Rankine : The Structure and Dimensions of Mole- 

 cules. 



Royal Anthropological Institute, at 8.15. — J. Whatmough : Rehtia, 

 the Venetio Goddess of Healinp-. 



Royal Society of Medicine (Psychiatry Section), at 8.30.— Dr. 

 R. G. Rows : The Application of Modern Methods in the Treat- 

 ment of Psychoses. 



WEDNESDAY, January 11. 



Royal Society of Arts (Mann Juvenile Lecture), at 3.— Dr. W. R. 

 Ormandy : Clay : What it is, where it comes from, and what 

 can be done with it. 



Institution of Civil Engineers (Students' Meeting), at 6.— E. W. 

 Monkhouse : The Economic Aspects of Various Methods of Power- 

 transmission. 



Institution of Automobile Engineers (at Institution of Mechani- 

 cal Engineers), at 8. — Dr. F. W. Lanchester and R. H. Pearsall : 

 An Investigation of Certain Aspects of the Two-stroke Engine 

 for Automobile Vehicles. 



THURSDAY, January 12. 



Royal Aeronautical Society (Juvenile Lecture) (at Royal Society 

 of Arts), at 3.— Major D. 0. H. Hume: Boats that Fly. 



London Mathematical Society (at Royal Astronomical Society), 

 at 5. 



Institution of Electrical Engineers, at 6.— Exhibition of Cine- 

 matograph Films.— P. Torohio, with explanatory notes by Dr. 

 C. C. Garrard : Investigations and Tests on High-tension Switch- 

 gear.— F. Gill : Telephone Inventors of To-day.— F. Gill : The 

 Audiou.— F. Gill : Electricity in the Home. 



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

 2 Furnival Street, E.C.), at 7.30.— A. H. Keable : Super Centri- 

 fugal Force and its Application to the Clarification of Varnish 

 and Dehydration of Oil. , „, . , 



Optical Society (at Imperial College of Science and Technoloe-vi, 

 at 7 30 —Dr. C. J. Peddle : The Manufacture of Optical Glass.— 

 Dr. J. W. French: The Barr and Stroud 100 ft. Self-contained 

 Base Rangefinder.— T. Smith: The Optical Three Apertures 

 Problem. , „ „, , ■ , 



Institute of Metals (I>ondon Section) (at Sir John Cass Technicnl 

 Institute), at 8— Col. N. Belaiew : The Inner Structure of th. 

 Crvstalline Grain. 



Harveian Society (Annual General Meeting) (at 11 Ohandos Street, 

 W.l), at 8.15.— Dr. G. de Bee Turtle : Some Points on Spasm in 

 the Alimentary Tract (Presidential Address). 

 FRIDAY, January 13. 



Royal Astronomical Society, at 5.— J. S. Parask^vopoulos : Jupiter 

 in 1915 and 1916 : Rotation Period in Different Latitudes, from 

 Observations at the National Observatory, Athens.— Prof G. 

 Forbes : Solar Motion from 1922 Radial Velocities.— Major W. J. S. 

 Lockyer: The Use of a Graduated Wedge in Stellar Classifica- 

 tion and Parallax Work. 



CONTENTS PAGE 



Education and the Nation . . . ' 



Fifty Years of Electrical Science 3 



Fermat's Last Theorem. By G. B. M 4 



Chemistry of Coke-oven and By-product Works. 



By E. V. Evans . 4 



Lichens. By O. V. D • •• S 



British Mineral Resources. By Prof. H. Louis . . 6 



Our Bookshelf 7 



Letters to the Editor:— 



Atmospheric Refraction. {JVttA Diagram.) — 'Dr. 

 John Ball ; Instr.-Comdr. Thos. Y. Baker, 



R.N ^ 



TheMessageofScience.—W. Robertson 9 



Cohesion.— Wilson Taylor 1° 



The Resonance Hypothesis of Audition.— C R. G. 



Cosens and Dr. H. Hartridge " 



The Action of Sunlight.— Dr. C. W. Saleeby . . n 



Units in Aeronautics. — A. R. Low 12 



Self-fertilisation in Mollusca.—G. C. Robson ... 12 

 The Law of the Heart. By Prof. E. H. Starling, 



C.M.G., F.R.S. . »3 



A Summer Visit to Jan Mayen Island. (Illustrated.) 



By J. M. Wordie '5 



Obituary : — 



Sir German Sims Woodhead, K.B.E. By 



R. T. H 19 



Prof. G. S. Brady, F.R.S. By A. M )9 



Notes . 20 



Our Astronomical Column : — 



The Einstein Tower 24 



Changes in the Crab Nebula 24 



The Astrographic Catalogue 24 



Agriculture at the British Association. By Dr. A. 



Lauder ^5 



The Megalithic Monuments of Malta .27 



Graft-Hybrids 2? 



Fauna of African Lakes 28 



University and Educational Intelligence .28 



Calendar of Industrial Pioneers 29 



Societies and Academies .... 29 



Official Publications Received 3' 



Diary of Societies 31 



NO. 2723, VOL. 109] 



