388 



NATURE 



[December ii, 19 19 



The Hardwoods of Australia and their Economics. 

 By R. T. Haktr. Pp. xvi + 522 + plates. (Sydney: 

 The Technological Museum.), 



-Mternating Current Work : .\n Outline for Students 

 of Wireless Telegraphy. By A. Shore. Pp. ix+163. 

 (London : The Wireless Press, Ltd.) y. 6d. net. 



Telephony without Wires. By P. R. Coursey. 

 Pp. xi.\ + 4i4. (London: The Wireless Press, Ltd.) 

 iS-s. net. 



DIARY OF SOCIETIES. 



THURSDAY, Dhcembfr ii. 



RovAL Society, at 4.^0.— C. F. U. Meek : A Further Study of 

 Chromosome Dime it* ion*;. — J. M. H. Campbell, C. G. Douglas, and 

 F. G. Hob^on: The Respiratory Exchange of Man During and After 

 Muscular Kxercise.— Dr. A. D. Waller : The Energy Output of Dock 

 Labourer'* during Heavy Work — C. H. Usher: Histological Examination 

 of an Adult Human Albino's Eyeball, wiih a Note on Mesoblastic 

 Pigmentation in Foeial Eyes. — J. Gray : The Relation of Spermatozoa 

 to Certain Electrolytes, II 



LiNNRAN Society, at 5. — Prof. W. A. Hedman : Notes on the Abundanec 

 of Marine Animals and a Quantitative Survey of their Occurrence. — 

 J. B. Gatenby : 'i'he Fertilisation of the Calca-eous Sponees. 



Royal Colle(;e of Surgeo.ns ok England, at 5. — Sir Charles A. 

 liallance : The Surgerv of the Heart (liradshaw Lecture). 



Royal Institutk ok Public Health, at 5. — Dr. H. H. Thomson : The 

 Diagnosis and Treatment of Tuberculo-is in Relation to Public Health. 



Mathematical Sociftv (at Burlington House), at 5. — ^tajor P. A. 

 MacMiHon : Permutations, Lattice Permntatioti'!, and the Hyper- 

 geometrir Serifs. — L. T. Mordell : The Generating Function of the 

 Series 2F(«V/", wheie F(«) is the Number of Uneven Classes of Binary 

 (Quadratics of Determinant — «. — H. St-^inhaus : Fourier Coefficients of 

 Houn'^ed Functions. — D. Priabandrinsky : Steady Fluid Motions with 

 Free Surfaces. 



Institution ok Ei.ectricai, Evoi.veeks (at the Institution of. Civil 

 Engineers), at 6 — Capt. J. M. Scott Nfaxwell : Scientific Management— A 

 Solution of 'he " Capital and Labour" Problem. 



On. AND Colour Che.mists" Association (at 2 Fnrnival Stre-t, E.C.), 

 at 7. — The Principle of Application of Paint and Varnish, and How it 

 Affects the Works Chemist of the Paint and Varnish Industry. 



Optical Society, at 7.^0. 



Institution oi-- Auto.mobii k Engineers (Graduate Section) (28 Victoria 

 Street), at 8. — Debate : Worm 7'. Bevel Drive. 



Roval Socjetv of Medicine (Neurology Section), at 8.30.— Certain Late 

 Effects of Injuries of the Nervous System. 



FRIDAY, December 12. 



Department of Scientific and Industrial Resrarch.— Conference 

 of Research Organisations (at Institution of Civil Enetneers), at 2.30.— 

 Rt. Hon. A J. Halfour: Introductory Address.— H. .F. W. Bliss: 

 Research Associations and Consulting Work and the Collecting and 

 Indexing of Information.— Dr. W. L 1 wrence Balls: The Equipment of 

 Research Laboratories. 



Royal Astronomical Society, at 5.— Prof. Eddington and Others: 

 Consideration of the Theory of Relativity. 



Physical Society of London, at 5.— Prof. W. M Coleman : First Steps 

 in the Experimental Analysis of a Galvanic Cell.— L W. T. Walsh: 

 Radiation from a Perfectly Diffusing Circular Disc —Dr. N. W. 

 McLachlan : A Comparative Methol of Testing Thermionic Valve* for 

 Pa.ssing No Reverse Current at High V..Itages.— Dr. A, O. Rankine : 

 Recording and Reproducing Sounds bv Means of Light. 



Royal Society of Medicine (Clinical Section), at 5. 



Malacological Society op London (at the Linnean Society), at 6.— 

 Rev. Dr. A. H. Cooke : An Abnormality of Structure in the Radula of 

 Certain Rhachigtoseate MoU'-sca. - H. Watson : The Affinities of 

 Pryamidula, Acanthinula, and Vallonia. 



MONDAY, December 15. 



Institution OF Electrical Engineers (Informal Meeting) fat Chartered 

 Institute of Patent Agent<), at 7. — R, Rankin and Others : Discussion on 

 Some Reflections op Labour. 



FARADAvSociErv(attheChcmicalSociety). atB.— Lieut. W. A. Macfadyen: 

 Electrolytic Iron ' epos'tion. — A. fJ. Tarrant: The Measurement of 

 Physical Properties at High Temperatures.— J. G. Williams : The 

 ElectroUtic Komintlon of Perchlorae from Chlorate. — Piof. A. W. 

 Porter: The Vapour Pr--sstires of Binary Mixtures.- S. Horiba: Some 

 Relations between the Solubilities of Solutes and their Molecular 

 Volumes —Dr. K. J. Hartung : (1) An Accurate Method for the Deter- 

 mination of Vapour Pre-sure ; (2) Some Properties of Copper Ferrocvanide. 

 —Prof. K. D. . ampbell : The Solution Theory of St-et and the Influence 

 of Changer, in Carbide Concentration on the Electrical Resivtiviiv. 



Royal Institute of British Akchitects, at 8.— S. Ptrks : London 

 Town-P'annitig Schemes in i666. 



Royal Society of Arts, at 8.— Dr. J. 'J'. Hewitt: Synthetic Drugs 

 (Cantor Lecture). 



Surveyo'^s' Institution, at 8.— Discussion on The Future of the 

 Institution. 



Royal Geographical Society (at the ./Eolian Hall), at 8.30.— Capt. 

 E. H. Keeling : In Northern Anatolia, 1917. 



TUESDAY, December 16. 

 Royal Society of Medicink, at 5.— General Meeting of Fellows. 

 Royal Statistical Society, at 5-"5-— J- K. Allen: Some Changes in 



the Distribution of the National Income during the War. 

 Institutdn of Prtroleu.m Technologists (at Royal Society of Arts\ 



at 5.30.— A. J. Wilson : The Application of Liquid Fuel to Heavy-Oil' 



Engines. 



Institution of Civil Engineers, at 5.30.— Major E. O. Henrici : 



Precise Levelling. 

 Royal Photographic Society of Great Britain (Technical Meeting), 



at 7. — N. E. Luboshez : Fancy Lighting in Portraiture. 

 Illuminating Engineering SociETv(at Koyal Society of Arts), at ;.— 



Capt. W. A. Howells: The Art of Camouflage. 



WEDNESDAY, December 17. 

 Society of Glass Tecunoi.ogy (at Institute of Chcmistrj-). at 1.—]. 



Connolly, Dr. M, W. Travers, and Dr. W. E. S. Turner : The Position of 



the Glass Industry in America. 

 Royal United Service Institution, at 3.— Major-Gen. Sir Lewis 



Jackson : Possibilities of the Next War. 

 Royal Society of Arts, at 4.30.--C. Grunwald : The Present Economic 



Position of Russia, and Some Aspects of its Future development. 

 Royal Meteorological Society, at 5. — F. J.W.Whipple: The Laws 



of Approach to the Geostrophic Wind. — G. M. 11. Dob'-on : Winds and 



Temperature Gradients in the Stratosphere. — Capt. C. J. i'. Cave : 



Quotations from the Diary of Samuel Pepys on the Weather. 

 Geological Society of London, at 5.30.— *^ecretary of Stale for the 



Colonies: An Earthquake at Rabaul in May, iqiq. — R. R. Lempriere : 



The Raised Beach at South Hill (Jersey). — Prof. ,^. J. Shand : A Rift- 

 Valley in Western Per.sia. 

 Institution' of Electrical En(;ineebs (Wireless Section)(at Institution 



of Civil Engineers), at 6 — Prof. G. W. O, Howe : High-Frcquency 



Resistance of Wires and Coils. 

 Royal Microscopical Society (at the Northampiou Polytechtiic Insti- 

 tute), 7. 30-10. 30. — Conversazione. 



THURSDAY, December 18. 

 Royal Society of Akt , at 4.30. — P. I. Hartog : Some Problems of 



Ind an Education. 

 Institution ok Mining and Meiallurgy (at Geological Society), at 



5.30. — Adjourned Discussion on A Contribu ion to the Study of Flotation, 



H. L. Sulman. 

 Institution of Eleciricai. ENGiKEERsfat Institution of Civil Engineers), 



at 6. — D. M. W. Hutchison and W. J. Wayte ; Electricity in Tin 



-Mining. 

 Arisioti-lian Society (at 22 -Albemarle Street), at 3. — Dr. G. E. Motre : 



I'-xterna! and Internal Kelaiions. 

 Chemical Societv, at 8. — Prof. J. VValkcr : War Experiences in the 



Manufacture of Nitric Acid and the Recovery of Nitrous Fumes. 

 FRIDAY, Uecember ig 

 Institution of Mechanical Engineers, at 6. — G. W. Burtey : Cutting 



Power of Lathe Turning Tools, Part II. 



SATUR DAY, Deckmbkr 20. 

 Physiological Society (at St. Thorn is's Hospital), at 4-30. 



CONTENTS pa<;e 



Paras tic Amoebae and Disease. By Sir E. Ray 



Lankester, K.C B, F.R.S 569 



Astronomical Le:tures and Essays. liy H. C. P . 370 



The Dominion of Man 371 



Our Bookshelf 372 



Letters to the Editor: — 



Gravitalion and Light. — Sir Oliver J. Lodge, 



F.R.S 372 



The Deflection of Lij^ht tluring a Solar Eclipse. — 

 Prof. A. S. Eddington, F.R.S.; Dr. A. C. D. 



Crommelin. (IVitk Ditgiam.) 372 



Sex- Phenomena in the Common Limpet (Patelii 



zmlg.i/a). (IVil/t Diagram )~V>i. ya. Onon . 373 

 A Tribute from Prague.— Prof. Bohuslav Braurer 374 

 Einstein's Relativity Theory of Gravitation. II. 

 The Nature of the Theory. Hy E. Cunningham . 374 



Lord Walsingham, F.R.S 376 



Notes .... 376 



Our Astronomical Column ; — 



Comets 3^" 



Wireless Time .Signals 3^ 



Leeds A.stronomical Society . . 3^ 



Thejubileeof "Nature": Further Official Messages 380 

 The British Association at Bournemouth : — 



Section K— Botany — Openinjj ,\il(lress (Abridged) by 

 Sir Daniel Morris, K.C.M.G., M.A., D.Sc, 

 D.C.L., LL.D., F.L.S., President of the 



Section 381 



University and Educational Intelligence .... 385 



Societies and Academies 3^6 



Books Received 3^7 



Diary of Societies 3^8 



I 



NO. 2615, VOL. 104] 



Editorial and Publishing Offices: 



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Advertisements and business letters to be addressed to 

 Publishers. 



Editorial Communications to the Editor. 

 Telegraphic Address: Piiusis, London. 

 Telephone Number : Gerrard 8830. 



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