SCIENCE.— AD VERTISEMENTS. 



Macmillan & Co.'s New Books in Science. 



SCIENTIFIC WEATHER OBSERVATION AND PREDICTION. 



Meteorology. Weather and Method of Forecasting. 



Description of Meteorological Instruments, and Eiver Flood Predictions in the United States. By Thomas 

 Russell, XJ. S. Assistant Engineer. 8vo, cloth, illustrated, $4.00. 

 A work designed to show how trustworthy predictions of coming weather may be made, and in what 

 cases useful forecasts are possible. The method is based chiefly on statistics of the observed condition of the 

 air as to pressure, temperature and humidity of particular types. 



Memoir of Sir A. C. Ramsay. 



By SiK Aechibald Geikie, F. E. S., Director- 

 General of the Geological Survey of Great Britain and 

 Ireland. "With portraits. 8vo, cloth, §4.00. 



"The volume is in every sense a valuable contribution to 

 the history of contemporary science, while its intrinsic inter- 

 est and its skill of presentation will commend it to a wide 

 circle of general readers." — Times. 



Economic Classics. 



Edited by W. J. Ashley, M. A., Professor of 

 Economic History in Harvard University. 12mo, 

 limp cloth, each 75 cents. 



Adam Smith. Select Chapters and Passages from 

 ' The Wealth of Nations. ' 



David Ricardo. The first six chapters of ' The 

 Principles of Political Economy, ' etc. 



T. R. Malthus. Parallel Chapters from the First 

 and Second Editions of "An Essay on the Principles 

 of Population." 



Outlines of English Industrial History. 



By W. Cunningham, D. D., Fellow of Trinity 

 College, Cambridge, and Ellen A. McAethue, 

 Lecturer at Girton College. 12mo, cloth, 11.50. 



Steam and the flarine Steam Engine. 



By John Yeo, Fleet Engineer, Royal Na^'y, In- 

 structor in Steam and Marine Engineering at the 

 Royal Naval College. With illustrations. Medium 

 Svo, net, §2.50. 



Steel Works Analysis. 



By J. 0. Arnold, F. C. S. ( The Specialist's Series), 

 Professor of Metallurgy at the SheiBeld Technical 

 School, sometime Chief Chemist at the Sheffield Steel 

 and Ii-on Works. 12mo, 350 pages. Cloth, §3.00. 



Lens=Work for Amateurs. 



By Heney Oefoed, author of 'A Microscope Ob- 

 jective, Modern Optical Instruments,' etc. With two 

 hundred and thirty-one Illustrations. 16mo, 231 

 pages. Cloth, 80 cents. 



Elementary Lessons in Electricity and 

 Magnetism. 



By Sylvanus P.Thompson, D.Sc, B.A., F.E.A.S., 

 Principal of the City and Guilds of London Technical 

 College, Finsbury. New, Revised Edition, with many 

 Additions. With numerous Illustrations. 12mo, 

 $1.40, net. 



NEW WORK SY PSOFESSOIi BALDWIN, OF PRINCETON. 



MENTAL DEVELOPMENT IN THE CHILD AND THE RACE. 



Methods and Processes. By James Maek Baldtstin, 



Princeton College. 

 Lectures on Human and Animal Psy= 

 chology. 



Translated from the Second and Revised German 

 Edition (1892) by J. E. Ceeighton, A.B. (Dalhou- 

 sle), Ph.D. (Cornell), and E. B. Titchenee, A.B. 

 (Oxon. ), Ph.D. (Leipzig). Svo, Cloth, §4.00, net. 



Popular Lectures and Addresses. 



By Lord Kelvin, F.R.S. In 3 vols. Vol. II. 

 Geology and Qeneral Physics. With Illustra- 

 tions. Crown 8vo. §2.00 each volume. 



A Treatise on the Measurement of EIec= 

 trical Resistance. 



By William Aethue Price, M.A., A.M.I.C.E., 

 formerly Scholar of New College, Oxford. Svo, Cloth, 

 $3.50, net. 



Ph. D., Stuart Professor of Experimental Psychology, 

 Svo, cloth, §2.00, net. 



I Columbia University Biological Series- 

 I Edited by Heney Fairfield Osborn, Sc.D., Da 

 j Costa Professor of Biology in Columbia College. The 

 volumes of the series already published are as foUows; 

 I. From the Greeks to Darwin. By Heney 

 Fairfield Osboen, Sc.D. Svo, Buckram, 

 §2.00, net. 

 II. Amphioxus and the Ancestry of the Ver- 

 tebrates. By Aethur Willey, B.Sc, 

 Tutor in Biology, Colmnbia College. ■ With 

 a Preface by the Editor. With Illustrations. 

 Svo, Buckram, §2.50, net. 

 Law in a Free State. 



By Wordsworth Donisthorpe, author of ' Indi- 

 vidualism a System of Politics, ' etc. 12mo, cloth §2.00. 

 ' ' The work of an acute thinker and \'igorous 

 writer." 

 A TIMELY AND PRACTICAL BOOK ON THE CUBRENCY. 



HONEST MONEV. 



By Arthur I. Fonda. A work dealing in a rational and common sense way with the requirements of 

 an honest money, criticising the merits and defects of various proposals for its betterment, with an outline of 

 a new monetary system that seems to meet the requirements and correct existing faults. 12rao, cloth, $1.00 



MACMILLAN & CO., 66 FIFTH AVENUE, NEW YORK. 



