6i4 



NATURE 



[January 30, 19 13 



Papers, 1800-1900. Subject Index. Vol iii., Physics. 

 Part i.. Generalities, Heat, Light, Sound. Pp. c + 

 Soo + vii. (Cambridge University Press.) i8s. net. 



Geological Literature added to the Geological 

 Society's Library during the Year ended December 

 31, 1911. Pp. 164. (London : Geological Society.) 



The Positive Evolution of Religion : its Moral and 

 Social Reaction. By F. Harrison. Pp. xx + 267. 

 (London : W. Heinemann.) 215. net. 



Researches in Colour Vision and the Trichromatic 

 Theory. By Sir W. de W. Abney. Pp. xi + 418 + v 

 plates. (London : Longmans and Co.) 21s. net. 



Egyptian Government. Almanac for the Year 1913. 

 Pp. vii + 212. (Cairo: Government Press.) P.T.s 



The Gas, Petrol and Oil Engine. Vol. ii.. The 

 Gas, Petrol and Oil Engine in Practice. New and 

 Revised Edition. By Dr. D. Clark and G. A. Burls. 

 Pp. viii + SjS. (London: Longmans and Co.) 25s. 

 net. 



Year Book of the Indian Guild of Science and 

 Technologv. iqi2. Pp. 193. (Letchwr.rth : The 

 Letchworth Printers.) 



DIARY OF SOCIETIES. 



THURSDAY. Janfaky 30. 

 Royal Society, at 4.30.— The Formation of Usually Convergent Fourier 

 Series : Prof. W. H. Young. — The General Theory of Elastic Stability : 

 R. V. Southwell. — A .Spectro-photometric Comparison of the Emissivity 

 of Solid and Liquid Copper and of Liquid Silver at High Temperatures 

 with th.1t of a Full Radiator: C. M. Stubbs.— A New Analytical Ex. 

 pression for the Representation of the Components of Diurnal Variation 

 of Terrestia! Magnetism ; G. W. Walker. — An Investigation into the 

 Magnetic Behaviour of Iron and some other Metals under the Oscillatory 

 Discharge from a Condenser : Prof. E. W. Marchant— The Spontaneous 

 Crystallisation and the Melting and Freezing-point Curves of two Sub- 

 stances which form mixed Crystals and the Freezing Point Curve of 

 which exhibits a Transition Point. Mixtures of p. Bromonitrobenzene 

 and p. Chloronitrobenzene : Florence Isaac. 

 RovAL Institution, at 3.— Recent Research on the Gas Engine: Prof. 



B. Hopkinson. 

 Concrete Institute, at 7.30.— The .Settlement of Solids in Water and its 



Bearing on Concrete Work: Dr. J. S. Owens. 

 Society of Dyers and CoLOURlSTS.al 8.— The Possibilities of a Standard 

 Light and Colour Unit : J. W. Lovibond.— A Simple Method for Detect- 

 ing Silk, Cotton and Wool Fibres in Admixture in Textiles : W. P. 

 Dreaper. 



FRIDAY, January 31. 

 Royal Institution, at 9.— The Poetry and Philosophy q^ George 

 Meredith : G. M. Trevelyan. 



MONDAY, February 3. 

 Society of Engineers, at 7.30.— The Bus i'. Tram Controversy, and 



other Aspects of the London Traffic Problem : Wm. Yoralh Lewis. 

 Royal Society of .■^rts, at 8.— Liquid Fuel : Prol. V. B. Lewes. 

 Aristotelian Society, at 8. 



Society of Chemical Industry, at 8. — The Behaviour of Paint under 

 the Conditions of Practice with special reference to the .Aspersion cast 

 upon Lead Paints : H. E. Armstrong and C. A. Klein.— The Technical 

 Production of Ethane : C. Sprent.— I'he Feeding Value of the Horse 

 Chestnut : S. I. M. Auld. 

 Institution of Civil Engineers, at 8.— Can.als and Canalised Rivers: 



J. A. Saner. 

 Victoria Institute, at 4.30.— Vision, in Sacred and other History: Rev 

 J. H. Skrine. 



TUESDAY, Fei.ruarv 4. 

 Royal Institution, at 3.— The Heredity of Sex and some Cognate 



Problems : Prof. \V. Baleson. 

 Rontgen Society, at 8.15.— The Conslruction of Induction Coils: R. S. 

 Wright.— A Simple Method for Inserting Radium into Lengths of Sterile 

 Rubber Tubes: C. E. S. Phillips. 

 Zoological Society, at 8.30 —Contributions to the Anatomy and 

 Systematic Arrangement of the Cestoidea. VIII. Some Species of 

 Ichthyotajnia and Ophidora.-nia from Ophidia : Dr. F. E. Beddard.— 

 Report on the Deaths which occurred in the Zoological Gardens during 

 1912: H. G. Plimmer.-The Anterior Ambulacrum of j5'rf/Vwrar<i'r»m 

 corilatiiii,, Penn., and the Origin of Compound Plates in Echinoids : 

 H. L. Hawkins.— Plankton fro.u Christmas Island. Indian Ocean. II. 

 Copepoda of the Genera Oilhona and Paroithona : G. P. Farran. 

 Royal .Anthropological Institute, at S.15.— Cave Exploration in 



Gibralterin September, 1912: Dr. W. L. H. Duckworth. 

 Institution of Civil E.ngineers, at 8. — Further Discussion: The 

 Canton-Kowloon Railway (Chinese .Section) : F. Grove and B. T. B. 

 Boothby.— IbeCanlon-Kowloon Railway (British Section) : G. W. Eves. 

 Frohal'h Paper : The Erection of the Boucanne River Viaduct, Canada : 

 P. L. Pratley. 



WEDNESDAY. February s. 

 SociETYOF Public .Analysts, at 8.— Antipyrine in toxicological Analysis : 

 G. D. Lander and H. W. Winter. —The Accurate Determination of 

 Carbon Dioxide in Carbonates : F. S. Sinnatt.— A New Method for the 

 Volumetric Estimation of Chromium. Vanadium and Iron in Admixture : 

 F, W. Atack.— Note on Hardened Oils : A. W. Knapp. 

 Royal Society of Art.s, at 8.— Ihe Economic and Hygienic Value of 

 Good Illumination : Leon Caster. 



NO. 2257, VOL. 90] 



Geological Society, at 8.— Two Deep Borings at Calvert Station (Norib 

 Buckinghamshire), and on the Palaeozoic Floor North of the Thames : Dr. 



A. M. Davies and J. Pringle.— The Skeleton of Ornithodesmiis latidea^ 

 from the Wealden Shales' of Brightstone Bay (Isle of Wight) : R. W. 

 Hooley. 



Entomological Society, at 8. 



THURSDAY, February 6. 



Royal Society, at 4.^0.— Probable Papers : The Influence of the Resilience 

 of the .Arterial Wall on Blood Pressure and on the Pulse Curve : S. R. 

 Wells and L. Hill.— The Occurrence of a Ganglion in the Human 

 Temporal Bone not nitheno described : A. A. Gray.— The Action of 

 Adrenin on Veins : J. A. Gunn and F. B. Chavasse. — A Preliminary 

 Report on the Treatment of Human Trypanosomiasis and Yaws, with 

 Metallic Antimony: Capt. H. S. Ranken.— Further Researches on the 

 Extrusion of Granules by Trvpanosomes and on their Further Develop- 

 ment. (With a Note on Methods by H. G. Plimmer) : Major W. B. Fry 

 and Capt. H. S. Ranken. 



Royal Institution, at 3.— Recent Research on the Gas Engine: Prof. 



B. Hopkinson. 



LiNNEAN Society, at 8.- Crosses of a Wild Pea with Cultivated Types : 



A. W. Smion.—R!:eo.yy!o>i ajricanum. a New Medullosean Stem: N. 



Bancroft.— Revision of the Linnean Types of Paljearctic Rhopalocera : 



Dr. R. Verity. 



FRIDAY, February 7. 

 Royal Institution, at 9. — Life in the Great Oceans; Sir John Murray, 



K.C.B. 



SA TURD A Y. February 3. 

 Royal Institution, at ^. — The Properties and Constitution of the Atom : 



Sir J. J. Thomson, O.M. 



CONTENTS. PAGE 



Problems of Soil Fertility. By E. J. R 589 



The Oak and its Lore. By Rev. John Griffith . . 589 



Fagnano's Mathematical Works. By G. H. B. . . 590 



Geology in the Southern Hemisphere. ByG.A.J.C. 590 



Our Bookshelf 591 



Letters to the Editor: — 



Limiinous Halos sunounding Shadows of Heads. — J. 



Evershed; L. L. Fermor 592 



Piocryptic Coloration a Protection against Lions. — 



R. I. Pocock, F.R.S 593 



Animal Coloration.- M. D. Hill . . . . 593 



The Redectiun ul the .\-Rays.— H. Moseley, C. G. 



Darwin .... 594 



Emission of Particles by Heated Metals.— D. M. 



Shaw 594 



ThernKii Efficiency of Gas and Electricity — W. M. 



Mason ... . . 594- 



Reseaicli Defence Society.— Sir David Gill, K.C.B., 

 F.R.S. , Prof. F. M. Sandwith, Dr. Stephen 



Paget 594. 



Retinal Shadows?— R. M. Deeley 594 



A University in the Tropics 595 



The Natural History Collections of the British 



Museum. Bv W. C. M 595 



Paul Gordan. By M 597 



Notes 597 



Our Astronomical Column : — 



Astronomical (Occurrences for February 601 



The Reported Bright Meteor of December iS . . . . 601 



Catalogue of Celuitial Objects 601 



The Vagaries of Encke's Comet 601 



Relative Proper Motions of 162 Slavs near the Orion 



Neluil 601 



The Aviation Exhibits at the Science Museum, 



South Kensington. {Illustrated.) 602 



Scif-nce at Recent Educational Conferences. By 



G. F. Daniell 603 



Modern Microscopical Optics with Special Refer- 

 ence to Fluorite Objectives. By C. Metz .... 603 

 Some of the Next Steps in Botanical Science. By 



Prof. C. E. Bessey 607 



University and Educational Intelligence 610 



Societies and Academies • . 612 



Books Received 613 



Diary of Societies 614 



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