136 



NATURE 



[October i, 19 14 



Council of the three Ridings of Yorkshire has con- 

 tinued the work connected with education and instruc- 

 tion in agricultural subjects, acting through the agri- 

 cultural department of Leeds University, on the same 

 lines as before. Full particulars are given of the 

 council's scheme of scholarships and exhibitions. This 

 provides assistance for persons desirous of obtaining 

 instruction in all grades of education other than 

 elementary. It provides for the properly qualified pupil 

 in the elementary school who desires to proceed to a 

 secondary school and furnishes him at a later stage 

 with the means to enter a university ; it also offers 

 instruction to boys and girls who have commenced 

 work in office or mill and can devote only their even- 

 ings to the continuance of their education, as well as 

 to the craftsman who desires to increase his usefulness 

 by further study. For the benefit of artisans and 

 workers in the leading industries of the West Riding, 

 such as the textile trades, engineering, coal mining, 

 and agriculture, a number of technological scholar- 

 ships and exhibitions have been set apart to enable 

 the holders to go through specialised courses, usually 

 of two years' duration. Technological scholarships 

 were held in 1913-14 by five engineers and five textile 

 workers. 



BOOKS RECEIVED. 



Chemical Engineering : Notes on Grinding, Sifting, 

 Separating, and Transporting Solids. By J. w! 

 Hinchley. Pp. viii+103, (London: J. and A. 

 Churchill.) 2s. 6d. net. 



A Manual of Dental Anatomy, Human and Com- 

 parative. By C. S. Tomes. Seventh edition, edited 

 by Dr. H. W. M. Tims and Prof. A. Hopewell Smith. 

 Pp. VI + 616. (London: J. and A. Churchill.) iC5. 

 net. ^ ^ 



Functions of a Complex Variable. By Prof. J. 

 Pierpont. Pp. xiv + 583. (Boston and London: 

 Gmn and Co.) 20s. net. 



Text-book on Wireless Telegraphy. By Prof. R. 

 Stanley. Pp. xi + 344. (London : Longmans and Co.) 

 7^. 6d. net. 



Methods of Quantitative Organic Analysis. By 

 P. C. R. Kingscott and R. S. G. Knight. Pp. x + 

 283. (London : Longmans and Co.) 6s. 6d. net. 

 _ Records of the Survey of India. Vol. iv. Explora- 

 tions on the North-East Frontier during 1911-12-13, 

 under the direction of Col. S. G. Burrard. Pp. 91. 

 (Calcutta : Government Printing Office.) 65. 



Transactions of the Geological Society of South 

 Africa. Vol. xvii. January-June. Pp. 59. 21s. 

 Proceedings of the Geological Society of South Africa, 

 to accompany vol xvii. of the Transactions, January- 

 June, 19 14. Pp. xlix. (Johannesburg : Transvaal 

 Leader.) 



Mathematical Papers for Admission into the Royal 

 Military Academy and the Royal Military College, 

 July, 1914. Edited by R. M. Milne. Pp. 22. (Lon- 

 don : Macmillan and Co., Ltd.) is. net. 



The Journal of the Royal Anthropological Institute 

 of Great Britain and Ireland. Vol. xliv. January to 

 June. Pp. 240. (London : Royal Anthropological In- 

 stitute.) 155. net. 



The Government-General of Formosa. Bureau of 

 Communications. The Climate, Typhoons, and Earth- 

 quakes of the Island of Formosa (Taiwan). Pp. iii + 

 80. (Taihoku : Meteorological Observatory.) 



Soil Management. By the late Dr. H. F. King. 

 Pp. ix + 311. (New York: Orange Judd Company; 

 London : Kegan Paul and Co., Ltd.) 1.50 dollars net. 



Rural Improvement. By F. A. Waugh. Pp. xi+ 

 265. (New York : Orange Judd Companv ; London : 

 Kegan Paul and Co., Ltd.) 1.25 dollars net. 



NO. 2344, VOL. 94] 



Hunt and Burkett's Agriculture. Farm Animals. 

 By Profs. T. F. Hunt and C. W. Burkett. Pp. ix + 

 534. (New York: Orange Judd Company; London: 

 Kegan Paul and Co., Ltd.) 1.50 dollars net. 



Ihe Manchester Municipal School of Technology. 

 Calendar, 1914-15. (Manchester.) 



Conferencias de Seismologia Pronunciadas en la 

 Academia de Ciencias de la Habana. By M. G. 

 Lanza. Pp. xvi+157. (Habana: Lloredo y Ca.) 



Van Nostrand's Chemical Annual, 1913. Edited by 

 Dr. J. C. Olsen. Pp. xiv + 669. (London: Constable 

 and Co., Ltd.) 12s. 6d. net. 



Outlines of Applied Physics. By H. Stanley. Pp. 

 viii + 227. (London : Mills and Boon, Ltd.) 2s. 6d. 



Department of Agriculture. Behar and Orissa. 

 Crop Pest Handbook for Behar and Orissa (including 

 also Western Bengal). Pp. xxiii + leaflets 84 + ap- 

 pendices 2i + plates liv. (Calcutta: Thacker, Spink 

 and Co.) 4 rupees. 



The National University of Ireland. Calendar for 

 the Year 1914. Pp- clvi + 476. (Dublin: National 

 University.) 



Leeds Astronomical Society. Journal and Trans- 

 actions for the Year 1913. Pp. 106. (Leeds : R. 

 Jackson and Son.) 25. 



OIARV OF SOCIETIES. 



iVEDNESDAY. October 7. 

 Entomologicai, Society, at 8. 



CONTENTS. PAGE 



Ponies, Pheasants, and Poultry iii 



Silica and Silicates 112 



New Books on Chemistry . . 113 



Our Bookshelf 114 



Letters fo the Editor: — 



The Determination of Sex in the Gall-fly, Neiirolerns 

 lenticidaris [Spathegaster baccarum). — Dr. L. 



Donca-.ter ... 115 

 Asymmetric "Diffraction" and "Re-Diffraction" 

 of X-Radiation, {Ilhislratt'd.)—\. G. Rankin; 

 W. F. D.Chambers .... .116 



Glass for Optical Purposes. By S. D. Chalmers . 117 



The British Association in South Australia 118 



Dr. H. J. Johnston-Lavis . 119 



Notes 119 



Our Astronomical Column :— 



Comet 1913/ (Delavan) 123 



The Recent Solar Eclipse 123 



French Provincial Observatories in 1913 .... 123 



Strong Magnetic Fields for Solar Research . 123 



Recent Economic Zoology. By G. H. C 123 



Fatigue Stresses 124 



The Royal Society of Naples 124 



The Australian Meeting of the British Association — 



Section L. — Educational Science. — Opening Address 



by Prof. John Perry, D.Sc, LL.D., F.R.S., 



Presid nt of the Section 125 



University and Educational Intelligence . . 135 



Books Received 136 



Diary of Societies 136 



Editorial and Publishing Offices : 



MACMILLAN & CO., Ltd., 



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. 



