u 



NATURE 



[October 24, 1912 



BOOKS RECEIVED. 



Les Anaglyphes Geometriques. By II. Vuibert. 

 Pp. 32. (Paris : Vuibert.) 



Die Zustandsgleichung. By Prof. H. K. Onnes and 

 W. H. Keesom. Pp. 615-945. (Leipzig : B. G. 

 Teubner.) 



Animal Secrets Told. By H. C. Brearley. Pp. 

 xvi + 274. (London: Headley Bros.) 55. net. 



Tabellen der Luftgewichte 7?, der Druckaquivalente 

 /3f und der Gravitation g. By Dr. S. Riefler. Pp. 

 iv+io2. (Berlin: J. Springer.) 6 marks. 



A School Economic Atlas. By Dr. J. G. Bartholo- 

 mew. With Introduction by Prof. L. W. Lyde. Re- 

 vised edition. Pp. xii + 64. (Oxford: Clarendon 

 Press.) 2S. 6d. net. 



Map Projections. By A. R. Hinks. Pp. xii+126. 

 (Cambridge University Press.) 55. net. 



The A.B.C. Guide to Astronomy. By Mrs. H. P. 

 Hawkins. Second edition. Pp. iv + 120. (London: 

 Simpkin and Co., Ltd.) is. 6d. net. 



The Tribes of Northern and Central Kordof^n. By 

 H. A. MacMichael. Pp. xv+259. (Cambridge Uni- 

 versity Press.) los. 6d. net. 



Statics, including Hydrostatics and the Elements of 

 the Theory of Elasticity. By Prof. H. Lamb. Pp. 

 xii + 341. ' (Cambridge University Press.) los. 6d. 

 net. 



The Annual of the British School at Athens. 

 No. XVII. Session 1916-11. Pp. liv + 335 + xxi plates. 

 (London : Macmillan and Co., Ltd.) 25s. net. 



.\n Introduction to Algebraical Geometry. By Dr. 

 A. Clement-Jones. Pp. 548. (Oxford : Clarendon 

 Press.) 12s. 



Geschlechtszellen und Korperzellen ini Tierreich. 

 By Dr. von Berenberg-Gossler. Pp. 22. (Jena : 

 Gustav Fischer.) 60 pfennigs. 



The Montessori System. By Dr. T. L. Smith. 

 Pp. 'x + 78. (New York and London : Harper and 

 Brothers.) 2s. 6d. net. 



Die Gattung Hedera. By F. Tobler. Pp. v+151. 

 (Jena : G. Fischer.) 6.50 marks. 



Picturesque Nepal. By P. Brown. Pp. xvi + 205. 

 (London : A. and C. Black.) ~s. 6d. net. 



The Naturalist in Siluria. By Capt. Mayne Reid. 

 Cheap edition. Pp. 240. (London : The Year Book 

 Press.) 2S. net. 



The Calculus. By Prof. E. W'. Davis, assisted by 

 Prof. W. C. Brenke. Edited by E. R. Hedrick. Pp. 

 XX + 63. (New York: The Macmillsn Co.; London: 

 Macmillan and Co., Ltd.) 8s. 6rf. net. 



A Laboratory Manual in Chemistry. By Profs. 

 W. C. Morgan and J. A. Lyman. Pp. xiii+142. 

 (New York : The Macmillan Co. ; London : Macmillan 

 and Co., Ltd.) is. Sd. net. 



The Beginner in Poultry. By C. S. Valentine. 

 Pp. x + 450. (New York: The Macmillan Co.; Lon- 

 don : Macmillan and Co., Ltd.) 6s. 6d. net. 



A College Text-book on Quantitative Analysis. By 

 Dr. H. R. Moody. Pp. vi+165. (New York: The 

 Macmillan Co. ; London : Macmillan and Co., Ltd.) 

 e,s. 6d. net. 



Lecture Notes on Elementary Statics and Dynamics 

 for Intermediate Students. By Prof. J. Sen. Pp. 95. 

 (Calcutta : Hilton and Co.) is. 



Ueber die krankhaften Erbanlagen des Mannes. 

 By F. Lenz. Pp. 170. (Jena : G. Fischer.) 4.50 

 marks. 



sO. 2243, VOL. go] 



DIARY OF SOCIETIES. 



FRIDAY, OcTOBFR 25. 

 ofMechasical Engineers, at 8. — Characteristic Dynamical 

 Diagrams for the iMolion of a Train during the Accelerating and Retard- 

 ing Periods : Prof. W. E. Dalby 



Physical Societv. at 5. --The Constitution of Mercury Lines examined 

 by an Echelon Grating and a Lummer Gehrcke Plate: Prof. H. Nagaoka 

 and T. Takamine.— Note on the Mutual Inductance of Two Coaxial 

 Circular Currents: Prof. H. Nagaok.a.— The .^ibsorption of Gas in 

 Vacuum Tubes: S. E. Hill. 



SATURDAV, October 26. 



Essex Field Club (at the Essex Museum, Stratford, Essex), at 6.— 

 Some Recent Observations of the Physiography of the Stort Valley, with 

 special reference to the Rubble-Urift Deposits: Rev, Dr. Irving .ind 

 Percy A. Irving. — Report of Club's Delegates at the Dundee Meeting of 

 the British Association : W. Whitaker and Joseph Wilson. 

 TUESDAY, October 29. 



Zoological Societv, at 8.30. — (i) " Gaztlla JMyi" - Cazella /usci/roMs ', 

 (2) The Bornean P.antin : R. Lydekker. — Notes on the Breeding of the 

 "Millions" Fish {GirardtHus pceciloides)'. E G. Boulenger. — The 

 Crustacea Isopoda of the Porcupine Expedition: Rev. T. R. R. 

 Stebbing.— Contributions to the Anatomy and Systematic Arrangement 

 of the Cestoidea.— VII. On Six Species of Tapeworms from Reptiles 

 belonging to the Genus Ichthyotaenia (s.l.): Dr. F. E. Beddard.— 

 Descriptions of New Butterflies of the Genus Thecla froniS.E. Brazil: 

 E. Dukinfield Jones. 



CONTENTS. PAGE 



The Dawn of Land Vertebrates. \\\ A. S. W. . . 215 



Science of the Soil, liy T. B. W. 215 



Philosophy and Psychology. IlyJ. A. H 216 



New Books on Chemistry. Bv T, M. L 217 



Our Bookshelf ' 218 



Letters to the Editor: — 



X-rays and Crystals.— Prof. W. H. Bragg, F.R.S. 219 

 Glaciation and Striation. — Sir E. Ray Lankester, 



K.C.B., F.R.S 219 



Nautilus PlmiIs. — Prof. Sydney J. Hickson, 



F.R.S 220 



Sailing Flight of Birds. — F. W. Headley .... 220 



The Zodiacal Light. — E. G. Fenton ..... 220 

 Colouis cf Plasmodia of Some Mycetozoa. — 



Kumagusu Minakata 220 



The "Michael Sars " in the Atlantic. {Illustrated.) 



By Dr. E.J. Allen 221 



The Swiss Society of Natural Sciences 223 



The University of Bristol — Installation of Lord 



Haldane as Chancellor ... 224 



William Bottomley. By J. A. E 226 



Prof. Lewis Boss 226 



Notes 227 



Our Astronomical Column : — 



The Discovery of a Comet, 1912/' 231 



Comet I912<; (Gale) 232 



lVIe.isuring the Angular Di.imeters cf .Slars 232 



The Perseids of August 12, 1912 232 



The Physical Cause of the c-Term in Latitude 



Vari;\tion 232 



The Becquerel Memorial Lecture of the Chemical 



Society . . 232 



The Relations between Various Solar Phenomena 233 

 The Significance of Life to the Omaha. By Dr. 



A. C. Haddon, F.R.S .234 



The Royal Microscopical Society 235 



The British Association at Dundee : — 



Section .M. — Agriculture. — From the Opening 

 Address l>y T. H. Middleton, M.A., President 



of the Section 235 



University and Educational Intelligence 243 



Societies and Academies 243 



Books Received . 244 



Diary of Societies 244 



Editorial and Publishing Offices : 



MACMILLAN & CO., Ltd., 



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



Adverlisetnents and business letters to be addressed to the 



Publishers. 



Editorial Conimimications to the Editor. 



Telegraphic Address : Phusis, London. 

 Telephone Number : Gerrard 8S30. 



