82 



NATURE 



[September 17, 19 14 



ber, and thickness of the band of explosive. — Kr. 

 Birkeland and M. Skolem : Calculation of the lines of 

 equal intensity in the zodiacal light, on the supposition 

 that it arises from the light diffused by a nebula of 

 electrons or of radiant matter of solar origin. The 

 formulae deduced are illustrated graphically in seven 

 diagrams. — H. Bourget : Partial eclipse of the sun of 

 August 21 observed at the Observatory of Marseilles. 

 The first and second contacts were observed under 

 good conditions. — D. Saint-Blancat and L. Montange- 

 rand : Observation of the partial eclipse of the sun of 

 August 21, 1914, at the Observatory of Toulouse. The 

 times of first and second contacts are given. — I. 

 Tarazona and V. Marti : Observation of the eclipse of 

 the sun of August 20-21, 1914, made at the astro- 

 nomical observatory of the University of Valentia 

 (Spain). — J. J. Landerer : The total eclipse of the sun 

 of August 20-21, 1914. — L. Bouchet : New determina- 

 tions of Poisson's coefficient for vulcanised india- 

 rubber. The pressures were produced by electrostatic 

 means. The value found for Poisson's coefficient 

 was appreciably equal to 05, signifying that india- 

 rubber is incompressible. 



BOOKS RECEIVED. 



Smithsonian Miscellaneous Collections. Vol. Ixiii., 

 No. 7. New Subspecies of Mammals from Equatorial 

 rtirica. By E. Heller. Vol. Ixiii., No. i. Hodgkins 

 Fund : Atmospheric Air in Relation to Tuberculosis. 

 By Dr. G. Hinsdale. (Washington : Smithsonian In- 

 stitution.) 



Pendlebury's New Concrete Arithmetic. By H. 

 Leather. First to Fifth Years. (London : G. Bell 

 and Sons, Ltd.) 4^., 4^., 4^., 6d., and 6d. 



British Association for the Advancement of Science. 

 Australian Meeting, 19 14. Handbook to Victoria. By 

 A. M. Laughton and Dr. T. S. Hall. Pp. xvi + 382. 

 (■Melbourne : A. J. Mullett.) 



Brown's Marine Electrician, for Sea -going 

 Engineers. By A. E. and A. H. Larkman. • Pp. xv+ 

 244. (Glasgow : J. Brown and Son.) 5s. net. 



Bacteria in Relation to Plant Diseases. By E. F. 

 Smith. Vol. iii., Vascular Diseases (continued) Pp. 

 viii + 309 + 47 plates. (Washington: Carnegie Institu- 

 tion.) 



Science and the Miller. By J. S. Remington. Pp. 

 166. (Liverpool : The Northern Publishing Co., Ltd.) 

 4s. 6d. net. 



Forty-third Annual Report of the Local Govern- 

 ment Board, 19 13-14. Supplement to the Report of 

 the Medical Officer. Third Report on Infant Mor- 

 tality. Pp. vi + 204. (London: H.M.S.O. ; Wyman 

 and Sons, Ltd.) 15. 2|d. 



A Theory of Civilisation. By S. O. G. Douglas. 

 Pp. 246. (London : T. Fisher Unwin.) 55. net. 



A Course of Geometry, Theoretical and Practical. 

 By A. H. Bell. Pp. vi+127. (London: Rivingtons.) 

 2S. 6d. 



Manual of Fruit Insects. By M. V. Slingerland 

 and C. R. Crosby. Pp. xvi + 503. (London: Mac- 

 millan and Co., Ltd.) 



County Folk-Lore. Vol. vii.. Examples of Printed 

 Folk-Lore concerning Fife, with some Notes on 

 Clackmannan and Kinross-shires. Collected by J. E. 

 Simpkins. Pp. xxxv + 419. (London : Sidgwick and 

 Jackson, Ltd.) los. 6d. net. 



A Treatise on Dynamics. By Dr. W. H. Besant. 

 Fifth edition, revised and enlarged bv A. S. Ramsey. 

 Pp. xv+443. (London: G. Bell and Sons, Ltd.) 



I2S. 



Elementary Geometrical Optics. By A. S. Ramsey. 

 Pp xi4-i73. (London: J. Bell and Sons, Ltd.) 65. 



NO. 2342, VOL. 94] 



The Deposits of the Useful Minerals and Rocks : 

 Their Origin, Form, and Content. By Profs. F. 

 Beyschlag, J. H. L. Vogt, and P. Krusch. Trans- 

 lated by -S. J. Truscott. Vol. i. Pp. xxviii-j-5i4. 

 (London : Macmillan and Co., Ltd.) i8s. net. 



British Association for the Advancement of Science, 

 1914. Handbook for New South Wales. Pp. xiv + 621. 

 (Sydney : E. Lee and Co.) 



New South Wales. Excursions arranged for 

 Members of the British Association for the Advance- 

 ment of Science, 1914 Meeting, Sydney, August 20-26. 

 Pp. 78. (Sydney.) 



Ceylon. Report of the Department of Agriculture 

 for the period July i, 1912, to December 31, 1913. 

 Pp 36. (Colombo.) 



Commonwealth of Australia. Further Investiga- 

 tions into the Etiology of Worm Nests in Cattle due 

 to Onchocerea gihsoni. Pp. 56. (Melbourne : A. J. 

 Mullett.) 



CONTENTS. PAGE 



The Cretaceous Flora.. By Prof. A. C. Seward, F.R.S. 55 



Electrostatics and Magnetism. By P. P 56 



Botany and Nature Study. By F. C 57 



Our Bookshelf 58 



Letters to the Editor: — 



The Age ofa Herring.— Prof. D'Arcy W.Thompson, 



C.B 60 



The Red Flash.— C. T. Whitmell 61 



Openings for British Chemical Manufacturers. By 



Dr. J. C. Cain 61 



Notes 62 



Our Astronomical Column :— 



Comet i9i3/"(Delavan) 65 



Further News of Eclipse Parlies 65 



Vertical Circle Observations at the U. S. Naval Obser- 

 vatory 66 



Parallaxes of the Brighter Galactic Helium Stars ... 66 



Papers on Invertebrates. By R. L 66 



Official Fishery Publications. By J. J 67 



Water Supply 68 



The Australian Meeting of the British Association- 

 Section H.— Anthropology.— Opening Address by Sir 

 Everard im Thurn, C.B., K.C.M.G., President 



of the Section 68 



Section L — Physiology.— Opening Address by Prof. 

 Benjamin Moore, M.A., D.Sc, F.R.S., Presi- 

 dent of the Section 74 



University and Educational Intelligence 80 



Societies and Academies 81 



Books Received 82 



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