National Geographic : 1899 Dec
NATIONAL GEOGRAPHIC MAGAZINE The Leading Scientific Journal of America SCIENCE A JOURNAL DEVOTED TO THE ADVANCEMENT OF SCIENCE. PUBLISHED EVERY FRIDAY. Annual Subscription, $5.00. Single Copies, 15 Cents. From its first appearance, in 1883, SCIENCE has maintained a repre sentative position, and is regarded, both here and abroad, as the leading scientific journal of America. Its Editors and Contributors come from every institution in this country in which scientific work of importance is accomplished, including Harvard, Yale, Columbia, Pennsylvania, Johns Hopkins, Cornell, and California Universities, among others. EDITORIAL COMMITTEE. S. NEWCOMB, Mathematics; R. S.WOODWARD, Mechanics; E.C. PICKERING, Astronomy; T. C . MENDENHALL, Physics ; R. H.THURSTON, Engineering ; IRA REMSEN, Chemis try ; J. LE CONTE, Geology; W. M. DAVIS, Physiography; HENRY F. OSBORN, Paleontology; W. K. BROOKS, C. HART MERRIAM, Zoology; S. H. SCUDDER, Entomology; C. E. BESSEY, N. L. BRITTON, Botany; C. S. MINOT, Embryology, Histology; H. P. BOWDITCH, Physiology ; J. S. BILLINGS, Hygiene; J. McKEEN CATTELL, Psychology ; J. W . PowEILL, Anthropology. NEW AND POPULAR SCIENTIFIC BOOKS. HARDIN The Liquefaction of Gases. Its Rise and Development. By WILLET L. HARDIN, Ph.D ., University of Penn sylvania. Cloth, 12mo, $1.50 . A popular yet complete account of the methods used in the liquefaction of air, among other gases. GANONG The Teaching Botanist. A Manual of information upon Botanical In struction, together with Outlines and Directions fur a Comprehensive Ele mentary Course. By WILLIAM F. GANONG, Ph.D ., Smith College. Cloth, I2mo, $1.o1 net. A manual of information upon botanical in struction, with outlines and directions for an elementary course. MACBRIDE The Slime Moulds. A Handbook of North American Myxomycetes. By THOMAS H. MACBRIDE, Professor of Botany, University of Iowa. Cloth, i2mo. A list of all species described in North America, including Central America, with an notations. SUTER Handbook of Optics. For Students of Ophthalmology. By WILLIAM N. SUTER, M. D ., National University, Washington, D. C . Cloth, i2mo, $i.oo net. Aims to give a clearer insight into the phenom" ena of refraction as applied to ophthalmology than can be obtained from the usual text-books on Refraction of the eye. THE MACMILLAN COMPANY, Publishers, NEW YORK, Please mention this Magazine when writing to advertisers.