6o 



NATURE 



[MAUcfi II, 1920 



thesis of Binary Stars. -T. C. Hudson: A Vectorial Theorem — R. A. 

 Sampson : Theory of t'le Four Great Satellites uf Jupiter. — J. Jackson : 

 ' he ' rb ts of 20 Double Stars. — H. W. Newton : Note on the Sun-spot 

 and Facu'ar Disturbance in the Region of the Eclipse Prominence of 1919. 

 —A. S. Willi.tms : The Observed Chang'-s in the Colour of Jupiter's 

 Equatorial Zone. — A. R. Hinks : A Pre. iniinary. Account of the Geo- 

 graphy of the 1922 Sepitember 20 Eclipse 'I'rack. 



Physical Societv of Lonoon, at 5. — F. W. Newman: Absorption of 

 Oases in a Discharge Tube. — F". S. G Thomas: A New Directional 

 Hjt-wire Anenioineer of High Sensitivity, especially applicable to the 

 Investigation of Slow Rates of Flow of Gases.— Dr. Hans Petterssen : 

 Exbibit of a New Micro-balance. 



Univeksitv College Emginebring Society (Annual Public Meeting), 

 at 5.30 —Sir Dugald Cleik : Coal Conservation. 



MalaC' •LOGICAL SOCIETY OF LoNDO.M (at Linnean Society), at 6. 



Institution ok Mechanical Engineers (Informal Meeting), at 7.— 

 A. J H. Kitt and Ott.ers: Costing. 



Junior Institution of Engineers, at 7.30. — F. A. Simpson : Chain 

 Helice Pumps. 



Harveian Society (at the Medical Society of London), at 8.30.— Sir 

 Thomas Horder : The Diagno t'C Significance of Nerve Symptoms in 

 Acute Infections (Harveian Oration). 



Royal Institution of Great Britain, at 9.— W. W. Rouse Ball : 

 String F'igures. 



SATURDAY. March 13. 



Royal Institution of Great Britain, at 3. — Sir J. J. Thomson : 

 Positive Rays. 



MONDAY, March 15. 



Victoria Institute (at Central Hall, Westminster), at 4.30. — E. W. G 

 Masterman : The Walls of Jerusalem at Various Periods. 



Royal Society of Mk.dicinh (Occasional Lecture), at 5, — Dr. J. 

 Freeman: Toxic Idiopathies: The Relationship between Hay and other 

 Pollen Fevers, Animal Asthmas, Fool I lio.syncra.sies, Bronchial and 

 Spasmodic Asthmas, etc. 



Institution of Electrical Engineers (Informal Meeting) (at Chartered 

 Institute of Patent Agents), at 7.— J. W. Beauchamp and S. M. Hills : 

 Industrial Electric Heating. 



Royal Institute of Bkitish Architects, at 8.— H. Austen Hall: 

 The Planning of American Departmental Stores. 



.Surveyors' Institution, at 8. 



Royal Geographical Society (at i^olian Hall), at 8.30.— Prof. J. L. 

 Myres : i he Dodekanese. 



TUESDAY, March 16. 



Royal Institution of Gkeat Britain, at 3.— Prof. A. Keith: 

 British Ethnology — The Invaders of Enclaiid. 



Royal College of Physicikns, at 5. — Dr. J. L. Bir'ey : The Principles 

 of Medical Science as applied to Military Aviation (Goulstonian 

 Lecture). 



Royal Society of Medicine, at 5.— (Special General Meeting of Fellows.) 



Royal .Statistical -soctETY, at 5.15. — M. S. Birkett : The Iron ancl 

 Sieel Trades during the War. 



Institution of Civil Engineers, at 5.30 —Sir Alexander B. W. 

 Kennedy ; L-intern Exhibit on of Views taken throughout the War Areas 

 in France and Flanders. 



Insiitutton of Petroleum Technologists (at Royal Society of Arts), 

 at 5.30. — M. A. Ockenden and A. Carter : Plant used in the Rotary 

 System of Drilliig Oi. Wells. ^-.;. .j4.. „ 



Mine ;alogical Society (at fieolosical Society), at 5 30. — A.Russell : The 

 Occurrence of Coiunni e, Anglesite, Leadhi lite, andGa'enaon Fused Lead 

 from the Wreck of the Fiieship Fire rands, Halmouth Harbour, Corn- 

 wall. — W.Campbell Smith: Kiebeckite-rhyolit'* from Northern Kordo- 

 fan.— Dr. G. T. Prior: The Meteoric Iron of Mount Ayliflf, Griqualand 

 East, South Africa. ri f-*-"^ 



2ool()gkal Society of London, at 5.30. — R. I. Pocock : The 

 External Charact rs of South American Monkeys.— Dr. C. F. Sonntag : 

 The Comparative Anatomy of the Tongues of the Mammalia : I. General 

 Description of the Tongue. 



Royal Phofograi'hic Society of Gre\t Britain (Lantern Meetin.;), 

 at 7. -Maj.-tJen. W. S. B ancker : Bird's-Eye Views of London and 

 other Districts in Eng'and from Aeroplane P'lotographs. 



Royal Anthroi-ulogical Institute, at 8.15. — N. W. Thomas : The 

 Ovia Secret Society (Illustrated by Lantern Slides and Phonograph 

 Record-).— Surg.-Lt. R. Buddie: Exhibition of Flint Implements from 

 kussia. 



WEDNESDAY, March 17. 



Royal United Service Institution, at 3.— Major H. F. S. Huntington 

 The Physical and Ethical Value of Boxing. 



RovAi. Society of Arts, at 4.30.— W. W. Beaumont : Street Passenger 

 Transport of London. 



Royal Meteorological Sociktv (at Royal Astronomical Society), at 

 5.— Capt. C. K M. Doughs: Clouds as seen from an Aeroplane. 



Institution of Electrical Engineers (Wireless Scction)(at Institution 

 of Civil Engineers), at 6 —(apt. P. P. Eckersley : Duplex Wireless 

 Telephony : Some Experiments on its Application to Aircraft. 



RovAL Aeronautical Soci-tv (at Royal Society of Arts), at 8.— 

 Major C. F. Abell Airship Machinery. 



Royal Microscopical Soci..ty, at 8. 



THURSDAY, March iS. 

 RovAL Instiiution of Great Britain, at 3. — Stephen Graham: The 



Spirit of America after the War. 

 Royal Society, at 4.30. — Probable Papei s.—\^ . B. Brierley : A Form of 



Botrytiscin rea with Colourless Sclerotia. — R. R. Gates : A Preliminary 



Account of the Mei tic Phenomena in the Pollen .Mother Cells and 

 Tapetum of Lettuce {Laciitca sativa). 

 Linnean Society, at 5. 

 Royal Coi lege of Physicians, at 5. — Sir Jo'in R. Bradford: The 



Clinical Experiences of a P.iysician during the Campaign in Fiance and 



Flanders, I9i4-i;9i9 (Lumleian Lecture). 

 InstitutiiJn of AIin-ing and Metallurgy (at Geological So .iety\ 



at 5.30. W. R. Jones: Tin and Tungsten Deposits: The Economic 



Signiiicance of their Relative lemperatures of Formation. 



Institution of Electrical Engineers (at Insiitution of Civi 

 Engineers), at 6.— Adj )urned Discussion on the Papers of W. H. 

 Patchell and S. H. FowUs read at the Meeting on March 11. 



Chemical Society, at S.— I. Mass m and R. McCall : I he Viscosity of 

 Nitrocellulose in Mixtures of Acetone and Water. — H. Stephen, W. F. 

 Short i<nd G. Gladdmg: Ihe Introduction of the Chloromethyl Group, 

 into the Aromatic Nucleus.— H. E. Cox : The Influence of the Solvent 

 on the Vcloci y of Reaction between cert lin Alkyl Iodides and Sodium 

 0-Naphthoxide. — H. Crompton and P. L.Vanderstichele: The Use of 1:2- 

 Dichlorovinylethyl Ether for the Production of Chloroacetates and Acid 

 Chlorides. 



FRIDAY, March 19. 



Royal Society of Arts (Indian Section), at 4.30.— Sir William S. 

 Meyer : The Indian Currency System and its Development--. 



Concrete Institute, at 6.— Dr. O. Faber : The Practical App'ication 

 of Reinforced Concrete. 



Institution of Mechanical Engineers, at 6 —D. Brownlie : Exact 

 Data on the Performance of Mechanical btokers, as applied to "Lanca- 

 shire" and other Narrow flued Boilers. 



Royal Institution of Great Britain, at 9.— E. McCurdy : Leonardo 

 da Vinci. 



SATURDAY, March 20. 



Royal Institution of Great Britain, at 3.— Sir J. J. Thomson: 

 Positive Rays •,.. ^^i 



Physiological Society (at University College), at 4.— J. F. ■ Donegan 

 and Others : Innervation of Veins. 



CONTENTS. PAGE 



The State and the National Museums 29 



Mathematical Cosmogony. ]5y H. C. P 31 



Tropical Medicine By J. W. W. S 33 



Practical Chemistry. By C. J. . .33 



Botanical Guides 34 



Our Bookshelf 35 



Letters to the Editor: — 



Gravitational Deflection of High-speed Particles. — 



Prof. A. S. Eddington, F. K.S 37 



Gravitational Shift of Spectral Lines. — Dr. Harold 



Jeffreys . . 37 



The Positian of the Meteorological Office. — Dr. Hugh 



Robert Mill ; Walter W. Bryant 38 



Organisation of Scientific Work — Sir J. C. Bose 

 Photographs of Seven Vocal Notes. {Illustrated.) — 



Dr. W. Perrett 



Scientific Direction of Industrial Research. — Major 



A. G. Church 



On Lanjimuir's Theory of Atoms. {With Di.igram.) 



S. C. Bradford 



Seconding of Officers for Study at Universities. — Prof. 



J. Wertheimer 



Scientific and Technical Books. — Sir R. A. Gregory. 

 Daylight Saving and the Length of the Working Day. 



— Amie D. B:tts ... 



Rainfall and Land Drainage. By Dr. Brysson 



Cunningham . 



The Work of the Medical Ressarch Committee . . 



The Mariner's Compass . . • 



The Gyrostatic Compass. {Illustrated.) By S. G. 



Brown, F. R.S . 



Obituary: Prof. J. Emerson Reynolds, F. R.S. By 



E. A. W 



Notes 



Our Astronomical Column : — 



j Bright Meteors . 



I Total Light of the Stars . 



Star Clusters , ... 



Meteorological Observations at Calcutta. By 

 W. W. U 



The Road to Industrial Peace. By H. M. V. 

 Wireless Telephony in Aeroplanes . . 

 Magnetic Storm of March 4-5 

 University and Educational intelligence . 

 Societies and Academies . . 



Books Received 



Diary of Societies '....... 



50 



5* 



54 

 54 



55 

 .55 

 55 

 56 

 56 

 57 

 59 

 59 



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NO. 2628, VOL. 105] 



Edito ial Communications to the Editor. 

 Telegraphic Address : Phusis, London. 

 Telephone Number : Gerrard 8830. 



