"As interesting to read as it is valuable to consult. By the employment of fine white paper and large, clear type, the publishers have made it an elegant specimen of the printer's art."--_New York Sun_. New York: D. APPLETON & CO., 72 Fifth Avenue. * * * * * D. APPLETON & CO.'S PUBLICATIONS. _THE ICE AGE IN NORTH AMERICA, and its Bearings upon the Antiquity of Man._ By G. Frederick Wright, D. D., LL. D. With 152 Maps and Illustrations. Third edition, containing Appendix on the "Probable Cause of Glaciation," by Warren Upham, F. G. S. A., and Supplementary Notes. 8vo. 625 pages, and complete Index. Cloth, $5.00. "Prof. Wright's work is great enough to be called monumental. There is net a page that is not instructive and suggestive. It is sure to make a reputation aboard as well as at home for its distinguished author, as one of the most active and intelligent of the living students of natural science and the special department of glacial action."--_Philadelphia Bulletin_. _THE GREAT ICE AGE, and Us Relation to the Antiquity of Man._ By James Geikie, F. R. S. E., of H. M. Geological Survey of Scotland. With Maps and Illustrations. 12mo. Cloth, $2.50. A systematic account of the Glacial epoch in England and Scotland, with special reference to its changes of climate. _THE CAUSE OF AN ICE AGE._ By Sir Robert J. Ball, LL. D., F. R. S., Royal Astronomer of Ireland, author of "Starland." The first volume in the Modern Science Series, edited by Sir John Lubbock. 12mo. Cloth, $1.00. "An exceedingly bright and interesting discussion of some of the marvelous physical revolutions of which our earth has been the scene. Of the various ages traced and located by scientists, none is more interesting or can be more so than the Ice age, and never have its phenomena been more clearly and graphically described, or its causes more definitely located, than in this thrillingly interesting volume."--_Boston Traveller_. _TOWN GEOLOGY._ By the Rev. Charles Kingsley, F. L. S., F. G. S., Cañon of Chester. 12mo. Cloth, $1.50. "I have tried rather to teach the method of geology than its facts; to furnish the student with a key to all geology; rough indeed and rudimentary, but sure and sound enough, I trust, to help him to unlock most geological problems which may meet him in any quarter of the globe."--_From the Preface_. _AN AMERICAN GEOLOGICAL RAILWAY GUIDE._ Giving the Geological Formation along the Rail-roads, with Altitude above Tide-water, Notes on Interesting Places on the Routes, and a Description of each of the Formations. By James Macfarlane, Ph. D., and more than Seventy-five Geologists. Second edition, 426 pp., 8vo. Cloth, $2.50.