SCIENCE 



New Series. TT t a A Q 1 RQfK Single CopiEa, 15 cts. 



Vol. ni. No. 66. r RIDAY, APRIL O, ioyo. Annual Subscription, J5.00. 



Macmillan & Co.'s New Publications 



statesman's Year Book (The) . statistical and Historical Annual of the States of the World for the 

 Year 1896. Edited by J. ScoTT Keltie, Assistant Secretary of the Royal Geographical Society, with 

 the assistance of I. P. A. Ken wick, M.A., LL.B. Thirty-third Annual Publication, Revised after 

 Official Returns. With Four Maps. — 1. To illustrate the Anglo-Russian Delimitation of the Pamirs ; 

 2. The Anglo-French Arrangement, 1896, with respect to Siam ; 3. The British Guiana and Venezuela 

 Boundary Dispute ; 4. To illustrate the recent arrangements in Bechuanaland. Thick 12mo, cloth, 

 pp. xxxii+1164, 13.00 net. 



*x.''*The four maps which are prefixed to this year's edition of the Year Book will serve to elucidate 

 more clearly than words can do the questions which they are intended to illustrate. The sections rela- 

 ting to the na%ries have been thoroughly revised by Mr. S. W. Barnaby, so that it should be easy to 

 ascertain the comparative naval strength of the different powers. 



Unna. — The Histopathology of the Diseases of the Skin. By Dr. p. g. Unna. Translated 

 from the German, with the assistance of the Author, by Noeman Walkeb, M.D., F.E.C.P.Ed., Assist- 

 ant Physician in Dermatology to the Royal Infirmary, Edinburgh. With double-colored Plate con- 

 taining 19 Illustrations and 42 Additional Illustrations in the Text. Cloth, pp. xxviii + 1205, $10.50. 



Del Mar.— The Science of Money. By Alexander Del Mae, M.E., formerly Director of the Bu- 

 reau of Statistics of the United States ; Mining Commissioner to the United States Monetary Commis- 

 sion, 1876; Author of a "History of the Precious Metals," a "History of Money," etc., etc. Second 

 Edition, Revised by the Author. 8vo, cloth, pp. xxvii + 205, |2.25. 



Dictionary of National Biography. Edited by Sidney Lee. Vol. XLVI. Pocock.— Puckering. 



8vo, cloth, gilt top, pp. vi + 449, |3.75 net. 



f^^ Please note that hereafter the price of the "Dictionary of National Biography " will Tie $3.75 net, per 



volume. Volumes already published will also he charged in future at $3.75 net. 



Bottone.— The Dynamo: How Made and How Used. By S. R. Bottone, Author of "Electric 

 Bells and How to Make Them," "Electric Instrument-making," etc. Ninth Edition, with Additional 

 Matter and Illustrations. 12mo, cloth, pp. 116, 90 cents net. 



Brown. — An Introductory Treatise on the Lunar Theory. By Ernest W. Brown, M.A., 

 Professor of Applied Mathematics in Haverford College, Pa., U. S. A., sometime Fellow of Christ's Col- 

 lege, Cambridge. 8vo, cloth, pp. xvi+292, $3.75 net. 



Cambridge Natural Science Manuals, {physical Series.) Mechanics. Dynamics, statics, and 

 Hydrostatics. An Elementary Text-Book, theoretical and practical, for colleges and schools. By R. 

 T. Glazebrook, M.A., F.R.S. 12mo, cloth, pp. 306, $2.25 net. 



Cambridge Mathematical Series. An Elementary Treatise on Mensuration. By B. T. Moore, 

 M.A., late Fellow of Pembroke College, Cambridge. With numerous examples. Second Edition, 

 Revised and Enlarged. 12mo, cloth, pp. 306, 80 cents net. 



Bell's Technological Handbooks. New Volume. A Text=Book of Gas Manufacture. For Stu- 

 dents. By John Hornby, F.I.C, Honours Medallist in Gas Manufacture, I^ecturer on Gas Manufac- 

 ture to the Barking Technical Instructive Committee, Author of "The Gas Engineer's Laboratory 

 Handbook." With Illustrations. 16mo, cloth, pp. xii + 261, $1.50. 



Lodeman. The Spraying of Plants. A succinct Account of the History, Principles and Practice of the 

 Application of Liquids and Powders to Plants for the Purpose of Destroying Insects and Fungi. By 

 E. G. Lodeman, Instructor in Horticulture in the Cornell University, with a preface by B. T. Gallo- 

 way, Chief of the Division on Vegetable Pathology, United States Department of Agriculture. With 

 Portrait and Numerous Illustrations. 16mo, cloth, $1.00. [Rural Science Series.) 



MACMILLAN & CO., 66 Fifth Avenue, New York. 



