56: 



NATURE 



[January i6, 19 13 



BOOKS RECEIVED. 



The Milk Question. By Prof. M. J. Rosenau. Pp. 

 xiv + jog. (London : Constable and Co., Ltd.) 7^. 6d. 

 net. 



Introduction to the Rarer Elements. By Dr. P. E. 

 Browning. Third edition. Pp. .xiii + 232. (New 

 Yorli : John Wiley and Sons; London : Chapman and 

 Hall, Ltd.) 



Willing's Press Guide, U113. Pp. xli + 487. (Lon- 

 don : J. Willing, Ltd.) is. 



Weather Bound. By R. T. Smith. Pp. 320. 

 (Birmingham : Cornish Bros., Ltd.) 155. net. 



The Value and Destiny of the Individual. The 

 Gifford Lectures for 1912, delivered in Edinburgh 

 University. By Dr. B. Bosanquet. Pp. xxxii + 331. 

 (London :' Macmillan and Co., Ltd.) los. net. 



Handbuch der Entomologie. Edited by Dr. C. 

 Schroder. Lief, i to 3. (Jena : G. Fischer.) 5 marks 

 each. 



Das Bodenwasser und die .-Xbkiihlung des Meeres. 

 Bv F. Nansen. Pp. 42. (Leipzig : Dr. W. Klink- 

 hardt.) 



The Sea West of Spitsbergen. The Oceanographic 

 Observations of the Isachsen Spitsbergen Expedition 

 in 1910. By B. Helland-Hansen and F. Nansen. 

 Pp. Sq + plat'es vi. (Christiania : J. Dybwad.) 



Finliindische hydrographisch-biologische Unter- 

 suchungen No. 10 Jahrbuch, 191 1, enthaltend hydro- 

 graphische Beobachtungen in den Finland umge- 

 benden Meeren. Edited by Dr. R. Witting. Pp. 

 129 + 4 plates. (Helsingfors.) 



Plant Diseases. Bv Dr. W. F. Bruck. Translated 

 bv Prof. J. R. Airisworth-Davis. Pp. 152. (Lon- 

 don : Blackie and Son, Ltd.) 2s. net. 



DIARY OF SOCIETIES. 



THURSDAY, Jani'arv i6. 



Royal Society, at 4.^0.— The Effect of Junctions on the Prop.igation 

 of Electric Waves along Conductors : Lord Rayleigh.— The Influence 

 of Chemical Constitution upon Interfacial Tension and upon the Forma- 

 tion of Composite Surfaces: W. B Hardy.— Duration of Luminosity of 

 Electric Discharge in Gases and Vapours: Hon. R. J. Strutt.— Some 

 Electrical and Chemical Effects of ihe Explosion of Azoimide : Rev. P. J. 

 Kirkby and J. R. Marsh.— Factors .effecting the Measurement of .absorp- 

 tion Bands: H. Hartridge,— The Refraction and Dispersion of the 

 Halogens, Halogen .\cids, Ozone, Steam Oxides of Nitrogen and Am- 

 monia ; and the Causes of the F.ailure of the Additive Law : Clive 

 Cuthbertson and Maude Cuthbertson.— Liquid Measurement bv Drops: 

 R. Donald.— The New Theory of Integr.ition : Prof. W. H. Young.— 

 Negative After-images with Pure Spectral Colours : Dr. G. J. Burch.— A 

 New Method of Measuring the Torque produced by a Beam of Licht in 

 Oblique Refraction through a Glass Plate : Dr. G, Barlow.— The Positive 

 lonisation produced by Platinum and by certain Salts when Heated : 

 Dr. F. Horton. 



Royal Institution, at 3.— Birds of the Hill Country: Seton Gordon. 



LiNNEAN Society, at 8.— j^ Visit to Madagascar in Search of Subfossil 

 Lemuroids : The Hon. P. Methuen.— Les Carldines des Seychelles, avec 

 des Observations sur leurs Variations : Prof. E. L. Bouvier.— Psychodida 

 of the Seychelles ; Ephemerida of the Seychelles : The Kev. A. E. Eaton. 

 — Odonata of the Seychelles : H. Campion— A New Land Leech from the 

 Seychelles : W. A. Harding.— Some New British Plants : G. C. Druce. 



Royal Society of Arts, at 4.30.— .Agricultural Progress in Western 

 India : G. F. Keatinge. 



Institution op Mining and Metalturgy, at 8.- (i) Some Considerations 

 on the Specification of Theodolites for Mines; (z) Specification of a 

 Precision-Theodolite (for Workings on Lodes of Medium Inclination and 

 Narrow or Medium Thickness): L. H. Cooke —Description of a Modern 

 Lead Concenlr.ating Mill, Broken Mill Junction North Mine, N.S.W. : 

 S. C. Bullock.— The Blast Roasting of Sulphide Ores : J. H. Levings. 



FRIDAY, Janit> 

 Royal Institution, at 9. — Further Applii 



Rays: Sir J. J. Thomson. 

 Institution of Mechanical Enginei 

 Stewart. 



MONDAY, January 20. 

 Royal Society of Arts, at 8.— Liquid Fuel : Prof. Vivian B. Lewes. 

 Victoria Institute, at 4.30. — The Fact of Prediction ; Rev. J. Urquhart, 



TUESDAY, January 21. 

 Roval Institution, at 3.— The Heredity of Se.^ and Some Cognate 



Problems : Prof W. Bateson. 

 Royal Statistical Society, at 5.— The Population of England in the 



Eighteenth Century : Prof E. C. K. Conner. 

 Minerai.ogicalSociety, at 5.30.— Optical .Activity and Enantiomorphism 



of Molecular and Crystal Structure ; T. V. Barker and J. E. Marsh.— 



Note on the Determination of the Optic Axial Angle of Crystals in Thin- 



NO. 2255, VOL. 90] 



of the Method of Positii 

 : 8.— Indicators : J. ( 



section: H. Collingridge— Graphical Determinations of . ■Angles and Indices 

 in Zones: Dr. G. F. Herbert Smith.— The Goldschnudt Apparatus for 

 Cutting Models of Crystals : J. Drugman.— ."V Nodule of Iron Pyrites: 

 Prof. H. L. Bowm.an. 



Institution of Civil Engineers, at 8.— The London and South-Weslern 

 and Metropolitan District Railways' Widening between .\cton L.ane and 

 Galena Road : K. A. Ogilvie. 



Royal .\nthroi'0logical I.sstitute, at 8.15. 



IVEDiVESDAY, January 21. 



Geological Society, at 8.— The Fossil Flora of the Marske Quarry 

 (Yorkshire)- H. Hamsha^v Thomas. With Notes on the Stratigraphy: 

 Rev. G. J- Lane.— The Derived Cephalopoda of the Holderness Drift: 

 C. Thompson. . . , , 



• .Arts, at 8. — Advertising : E. Street and L. Jackson. 



THURSDAY, January 23. 

 It ^.-sp.—ProliabU Fafers : The Relation of the Islets 

 ._ the Pancreatic Acini under Various Conditions of Secre- 

 tory Activity : Dr. J. Homans.— The Metabolism of Lactating Women: 

 E. Mellanby -(i) Colour .Adaptation ; (2) Tiichromic Vision and Anoma- 

 lous Trichromatism : Dr. F. W. Edridge-Green.-Transmi.ssion of En- 

 vironmental Effects from Parent to Offspring in Simocephalus : W. fc.. 

 Agar.— Contributions to the Histo-chemistry of Nerve ; the Nature of 

 Wallerian Defeneration : H O. Feiss 'and W. Cramer.— Onychaster, a 

 Carboniferous Brittle-star: I. B. J. SoUas. 



loYAL Institution, .at 3.— Birds of the Hill Country : Seton Gordon. 

 NSTiTUTiON of Electrical Engineers, at 8.— The Use of a Large 

 Lighting Battery in connection with Central Station Supply : F. H. 

 Whysall. 



FRIDAY, January 24. 

 :oYAl Institution, at 9.— Recent Advances in Scientific Steel Metal- 

 lurgy : Prof. J. O. Arnold. 



RoYAL So 



Royal Society, 

 of Large: 



CONTENTS. P-AGE 



A Mathematician's Lectures on Aeronautics. By 



Prof. G. H. Bryan, F.R.S 535 



Municipal Trading and Currency, liy N. B. Dearie 536 



Building Stones ... 537 



Physics for Children and Students ....... 538 



Our Bookshelf 53^ 



Letters to the Editor: — 



The Double Refraction produced by the Distortions 

 of Elastic Bodies according 10 Volterra's Theory. 



(///H.v/ra/«/.)— Prof. O. M. Corbino 540 



The Bacterial Theory of Soil Fertility. (Illusti-aied.\ 



—F. Fletcher; Dr. E. J. Russell ...... 541 



Precocity of Spring Flowers.— Eleonora Armitage ; 



Lady Lockyer; Edith How Martyn . . 543 

 Light I'urcepiion and Colour Perception.— Dr. F. W. 



Edridge-Green 543 



The L;itL- Mr. Leigh Smith and Novaya Zemlya.— 



W. H. R. v. Manen 544 



Countries and Customs. (Illtislra/ed.) 544 



A New International Physical Institute. By Prof. 



E. Rutherford, F.R.S 545 



The Birmingham Meeting of the British Association 546 



Lord Haldane on Educational Organisation .... 546 



Notes 547 



Our Astronomical Column : — 



The Sun's Magnetic Field 55' 



The Integrated Spectrum of the Milky Way .... 55' 



Cornels Due to Return this Year 55^ 



Parallax Investigations - 55^ 



Explosions in Mines. (Illusti-a/rd.) By Prof. W. 



Galloway 55^ 



The Bonaparte Fund of the Paris Academy of 



Sciences 554 



The Weather of igi2. By Chas. Harding . . . . . 555 

 Science Teaching in Public Schools. By Sir Archi- 

 bald Geikie, K.C.B., Pres. RS S5S 



Radiations Old and New (IVi/h Diagrams.) By 



Prof. W. H. Bragg, F.R.S 557 



University and Educational Intelligence 560 



Societies and Academies 5^' 



Books Received 5o2 



Diary of Societies 5^2 



Editorial and Publishing Offices: 



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ST. MARTIN'S STREET, LONDON, W.C. 



Advertisements and business letters to be addressed to the 



Publishers. 



Editorial Communications to the Editor. 



Telegraphic Address: Phusis, London. 

 Telephone Number : Gerrard 8830. 



