National Geographic : 1900 May
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; IENRY F. OSBORN, Paleontology; W. K. BROOKS, C. HART MERRIAM, Zoology; S. IH . 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. POWELL, Anthropology. NEW AND POPULAR SCIENTIFIC BOOKS. MANUAL OF BACTERIOLOGY By ROBERT MUIR, M.D ., F.R.C.P., Ed., Professor of Pathology, Univer sity of Glasgow, and JAMES RITCHIE, M.D ., Lecturer on Pathology, Uni versity of Oxford. Second edition. With 126 illustrations. Cloth, Cr. 8vo, $3.25 net. GANONG The Teaching Botanist. A Manual of information upon Botanical In struction, together with Outlines and Directions fir a Comprehensive Ele mentary Course. By WILLIAM F. GANONG, Ph.D., Smith College. Cloth, 2mnlo, $1. I nelt. 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. 5UTER Handbook of Optics. For Students of Ophthalmology. By WILLIAM N. SUTER, M. D ., National University, Washington, D. C. Cloth, 12mo, $1.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.