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SCIENCE PROGRESS 



The Tropical Agriculturist. Journal of the Ceylon Agricultural Society. Founded 

 in 1881 by the late Mr. John Ferguson, CM. G., F.R.A.S., F. R.C.I. April 

 1915. Vol. XLIV. No. 4. Peradeniya, Ceylon. Colombo: H. W. Cave 

 & Co. (Pp. xii + 70.) 



Elementary Studies in Plant Life. By F. E. Fritsch, D.Sc, F.L.S., Professor of 

 Botany, East London College, University of London, and E. J. Salisbury, 

 D.Sc, F.L.S., Lecturer in Botany, East London College, University of 

 London. London : G. Bell & Sons, 191 5. (Pp. xv + 194.) Price 2s. net. 



This altogether admirable little book is practically a condensed and simpli- 

 fied edition of the same authors' Introduction to the Study of Plants, which 

 was published last year and reviewed at the time in these columns. Apart 

 from the excellent features which it shares with the larger work, the present 

 volume is almost a miracle of cheapness, considering its attractive get-up and 

 the large proportion of fine photographs included among its many illustrations. 

 Physiology and ecology are kept well to the front and are presented in a 

 singularly clear and attractive manner, and no better " first book in botany " 

 could well be imagined. 



The Theory of Proportion. By M. J. M. Hill, M.A., LL.D., Sc.D., F.R.S., Astor 

 Professor of Mathematics in the University of London. London : Constable 

 & Co., 1914. (Pp. xx + 108.) Price 8s. 6d. net. 



A Treatise on the Analytic Geometry of Three Dimensions. By George Salmon, 

 D.D., D.C.L., LL.D., F.R.S., late Provost of Trinity College, Dublin. Edited 

 by Reginald A. P. Rogers, Fellow of Trinity College, Dublin. Fifth Edition, 

 Vol. II. ; Sixth Edition, Vol. I. London : Longmans, Green & Co., 39, Pater- 

 noster Row. New York : Fourth Avenue and 30th Street. Bombay, Calcutta, 

 and Madras. Dublin: Hodges, Figgis & Co., 104, Grafton Street, 1914. 

 (Vol. I., pp. xxiv + 470; Vol. II., pp. xvi -f 334.) Prices, Vol. I. gs. net, 

 and Vol. II. 7s. 6d. net. 



Handbook of Medical Entomology. By W. A. Riley, Ph.D., Professor of Insect 

 Morphology and Parisitology, Cornell University, and O. A. Johannsen, Ph.D., 

 Professor of Biology, Cornell University. Ithica, New York : The Constock 

 Publishing Co., 1914. (Pp. ix + 348.) Price 2 dollars. 



Amcebiasis and the Dysenteries. By Llewellyn Powell Phillys, M.A., M.D., B.C., 

 F.R.C.P., F.R.C.S., Professor of Medicine in the Egyptian Government 

 School of Medicine, Cairo ; Senior Physician, Kasr-el-Ainy Hospital, Cairo ; 

 Physician-in-Ordinary to H.H. the Sultan of Egypt ; Branch Medical Adviser, 

 Gresham Life Assurance Society. London : H. K. Lewis, 136, Gower Street, 

 W.C., 1915. (Pp. xi + 147.) Price 6s. td. net. 



The Mutation Factor in Evolution. With Particular Reference to Oenothera. By 

 R. Ruggles Gates, Ph.D., F.L.S., sometime Lecturer in Biology, St. Thomas's 

 Hospital ; Lecturer in Cytology, Bedford College, University of London ; 

 Huxley Medallist, Royal College of Science. London : Macmillan & Co., 

 Ltd., St. Martin's Street, 191 5. (Pp. xiv + 353.) Price 10s. net. 



ANNOUNCEMENTS 



Royal Meteorological Society. Meetings, 7.30 p.m., November 17, 

 December 15. 



Royal Astronomical Society. Meetings, 5 p.m., November 1 2, December 10. 



Royal Horticultural Society. Exhibition of Fruit and Annual Conference 

 of Affiliated Societies, 3 p.m., October 6 ; Exhibition of Flowers, Fruits, etc., with 

 Lecture at 3 p.m., October 12, 26, November 9, 23, December 7 ; Medical Exhibi- 

 tion, October 18 to 22 ; Exhibition of Flowers, November 11, 12, December 8 ; 

 London Cage Birds' Association Show, December 10 to 13. 



British Science Guild. Meetings of the Executive Committee, 3 p.m., 

 October 19, November 16, December 7. 



Printed by Hazell, Watson & Viney, Ld., London and Aylesbury, England. 



