SCIENCE.- ADVERTISEMENTS. 



Important Scientific Bool^s Recently Publislied 



ALLBUTT, T. Clifford, Universily of Cambridge. 



System of Medicine and <wj iiaecology. Complete in nine volumes. 



New and cheaper edition, $25. OU, nti, per set. 



BOTTOM E, S. R. 



Radium, and All About it. 9G p 12mo, il., paper 35 cts., mt. 



« 



BOYXTOiV, William Pingry, Universitv of Oregon. 



ApplicatiouN of the Kinetic Theory of Gases, Vapors, Pure 

 Liquids, and the Theory of Solutions. 10+288 pp. 8vo, cl., til.60«f(. 



DEXTER, Edwin <wrant. University of Illinois. 



Weather Influences. An Empirical Study of the Mental and Physiological 

 Effects of Definite Meteorological Conditions. With Iniri duciion by Cleveland Abbe, 

 LL.D. 31+286 pp. 8vo, cl., |2.00 net. 



GIBBOXS, Edward E., Universitg 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 

 E.xplanatory Cuts and Diagrams. 



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



HASTIiVGS, William W. 



A Manual for Physical Measurements. For use in Normal Schools, 

 Public and I'reparatory Schools, Boys' Clubs, Girls' Clubs, and Young Men's Chris- 

 tain Associations, with Anthropometric Tables tor Each Height for Each Age and Sex 

 from Five to Twenty Years and Vitality Coefficients. 



Edition for Boys and Girls. 18+122 pp. Large 4to, il., cl., 12.00 we/. 



Edition for Boys. 15+95 pp. Large 4to, il., cl., J>1.50 net. 



METCALF, Maynard M., Womaji's College of Baltimore. 



An Outline of the Theory of Organic Evolution. With a Descrip- 

 tion of Some of the Phenomena which It Explains. 17+204 pp. 8vo, il. , cl., |2.60 net. 



NICHOLS, Edward L., and William S. FRAIVKLIIV, Cornell University. 



The Elements of Physic. A College Text-Book. In Three Volumes. Vol- 

 ume I. — Mechanics and Heat. Third edition, rewritten with additions. 



10+290 pp. 8vo, cl., $1.90 net. 



RltwHI, AugU!>ito, University of Bologna. Authorized Translation by Augustus Trowbridge, 

 University of Wisconsin. Modern Theory of Physical Phenomena. 



Radio-Activiiy, Ions, Electrons. 13+165 pp. ]2mo, cl., $1.10 /if^. 



RUTHERFORD, E,, McGill University, Montreal. 



Radio-Activity. 8 + 399 pp. 8vo, il., cl., $3.50 nf<. 



SHEARER, John S., Cornell University. 



]Votes and Questions in Physics. New edition. 



7+284 pp. 8vo, il , cl., $1.60 net. 



SWE!VSO\, Bernard Victor, and FRAXKEIVFIELD, Budd. 



Testing of Electro-Magnetic Machinery and other Apparatus. 



Vol. 1 —Direct Current. 23+420 pp. Svo, il., cl, |3.00 net. 



WEVSSE, Arthur Wisswald, Massachusetts Institute of Technology. 



A Syno|»tic Text-book, of Zoology. For Colleges and Schools. 



25+525 pp. Svo, cl., il., $4.00 net_ 



WHITTAIiER,E. T., Tr/nrt^ College, Cambridge. 



A Treatise on tlie Analytical Dynamics of Particles and Rig- 

 id Bodies. With an Introduction to the Problem of Three Bodies. 



13+414 pp. Imperial Svo, cl., H-00 net. 



WILLIS, J. C Royal Botanic Gardens, Ceylon. 



A Manual and Dictionary of the Flowering Plants and Ferns. 



Second edition, revised and rearranged, in one volume. 



Cambiidije Biological Series. 21 + 67 pp. 12mo, il, cl., $2.75 net. 



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



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



