SCIENCE.— ADVERTISEMENTS. iii 



Important = Scientific = Books = Recently = Published 



BARXETT, S. J., Leland Stanford Jr. University. 



Elements of Electro-maguetic Theory. 480 pp., cloth, $3.00 net. 



CAMPBELL, Douglas Hoilgilton, of Leland Stanford Jr. University. 

 A Uuiversity Text-Book of Botany. 



With many Illustrations. 15-|-579 pp. , cloth, $4.00 net. 



DEXTER, Edwin Grant, Ph. D., University of Illinois. 



Weather Influences. An Empirical Study of the Mental and Physiological 

 Eifects of Definite Meteorological Conditions. Cloth, 8vo, |2.00 net. 



OEIKIE, Sir Archibald. 



Text-booh of OeolOgy. Fourth edition, revised and enlarged. In 2 volumes. 

 Vol. I, 17+702 pp.; Vol. II, 9+720 pp. 8vo, illustrated, cloth, $10.00 net. 



GIBBOIVS, Edward E., University of Maryland, Baltimore. 



The Eye : its Refraction and Diseases. The Refraction and Func- 

 tional Testing of the Eye, Complete in Itself, in Twenty-eight Chapters with Numerous 

 Cuts and Diagrams. 9 + 472 pp. 4to, il., cl., |5.00 net, half morocco, $6.50 net. 



mORIVS, Arthur H., Birmingham Municipal Technical School. 



Steel and Iron. For advanced students. 16+514pp. 12mo, illus., cloth, $2.50rae<. 



JAC&SON, D. C. and J. P. 



An Elementary Book on Electricity and Magnetism and 

 their Applications. 11+482 pp. Illustrated. 12mo, half leather, $1.40 wc<. 



JONES, Harry C, Johns Hopkins University. 



Elements of Inorganic Chemistry. 



13+343 pp. 12mo, illus., cloth, $1.5^6 net. 



&OCHER, Dr. Theodor, University of Bern. 



Operative Surgery. Authorized translation from (he Fourth German Edition 

 (much enlarged) by Harald J. Stiles. 255 Illustrations. Cloth, 8vo, $5.00 net. 



LE COIVTE, Joseph IV., University of California. 



An Elementary Treatise on the Mechanics of Machinery. 



With 15 plates. 10+311 pp. 12mo, cloth, $2.25 net. 



MORCrAlV, Thomas Hunt, Bryn Mawr College. 



Evolution and Adaptation. 14 + 470 pp. 8vo, cloth, $3.00 net. 



OSTWALD, Wilhelm. 



The I'rinciples of Inorganic Chemistry. 



With 122 Figures in the Text. 27+785 pp. 8vo, cloth, $6.00 net. 



RUTHERFORD, E., McGill University. 



Radio- Activity. 400 pp. 8vo, illustrated, $3.50 ne< 



SEDCirWlt'H, William T., Massachusetts Inst, of Technology. 



Principles of Sanitary Science and the Public Health. 



19+368 pp. 8vo, cloth, $3.00 net. 



SXlfDER, Harry, University of Minnesota. 



The Chemistry of Plant and Animal Life. 



17 + 406 pp. ]2mo, cloth, $1.40 



SWENSOIV, Bernard Tictor, and FRANKEIVFIELD, Budd. 



Testing of Electro-Magnetic Machinery and otlier Apparatus. 



Vol. I. 23+420 pp., illus., 8vo, cloth, $3.00 mi. 



TON ZITTEL, Carl A., University of Munich. 



Text-Book of Palaeontology. Vol. II. Translated and Edited by Charles 

 R. Eastman, Harvard College Museum. 8-t-283 pp. 8vo, cloth, $3.00 net. 



WElfSSE, Arthur Wisswald, Massachusetts Institute of Technology. 



A Synoptic Text-book of Zoology. For Colleges and Schools. 



25+525 pp., illus., 8vo, cloth, $4.00 net. 



Postage on net hooks ordered of the publishers is uniformly an extra charge. 



By The Macmillan Company, 66 Fifth Ave., New York 



