D. APPLETON & CO.'S PUBLICATIONS. 



HTHE ICE AGE IN NORTH AMERICA, and its 



J- Bearings upon the Antiquity of Man. By G. Frederick 

 Wright, D.D., LL. D., F. G. S.A., Professor in Oberlin 

 Theological Seminary; Assistant on the United States Geo- 

 logical Survey. With an appendix on "The Probable Cause 

 of Glaciation," by Warren Upham, F. G. S.A., Assistant on 

 the Geological Surveys of New Hampshire, Minnesota, and 

 the United States. New and enlarged edition. With 150 Maps 

 and Illustrations. 8vo, 625 pages, and Index. Cloth, $5.00. 



*' Not a novel in all the list of this year's publications has in it any pages of more 

 thrilling interest than can be found in this book by Professor Wright. There is noth- 

 ing pedantic in the narrative, and the most serious themes and startling discoveries are 

 treated with such charming naturalness and simplicity that boys and girls, as ( well as 

 their seniors, will be attracted to the story, and find it difficult to lay it aside. —Aew 

 York Journal of Commerce. 



" One of the most absorbing and interesting of all the recent issues in the depart- 

 ment of popular science." — Chicago Herald. 



"Though his subject is a very deep one, his style is so very unaffected and per- 

 spicuous that even the unscientific reader can peruse it with intelligence and profit, ,n 

 reading such a book we are led almost to wonder that so much that is scientific can be 

 put in language so comparatively simple." — New York Observer. 



"The author has seen with his own eyes the most important phenomena of the Ice 

 age on this continent from Maine to Alaska. In the work itself, elementary description 

 is combined with a broad, scientific, and philosophic method, without abandoning for 

 a moment the purely scientific character. Professor Wright has contrived to give the 

 whole a philosophical direction which lends interest and inspiration to it, and which in 

 the chapters on Man and the Glacial Period rises to something like dramatic intensity." 

 — The Independent. 



"... To the great advance that has been made in late years in the accuracy and 

 cheapness of processes of photographic reproduction is due a further signal advantage 

 that Dr. Wright's work possesses over his predecessors'. He has thus been able to 

 illustrate most of the natural phenomena to which he refers by views taken in the field, 

 many of which have been generously loaned by the United States Geological Survey, 

 in some cases from unpublished material ; and he has admirably supplemented them by 

 numerous maps and diagrams." — The Nation. 



M- 



AN AND THE GLACIAL PERIOD. By G. 



Frederick Wright, D. D., LL. D., author of " The Ice 



Age in North America," " Logic of Christian Evidences," etc. 



International Scientific Series. With numerous Illustrations. 



i2mo. Cloth, $1.75. 

 " It may be described in a word as the best summary of scientific conclusions con- 

 cerning the question of man's antiquity as affected by his known relations to geological 

 time." — Philadelphia Press. 



" The earlier chapters describing glacial action, and the traces of it in North Amer- 

 ica—especially the defining of its limits, such as the terminal moraine of the great 

 movement itself— are of great interest and value. The maps and diagrams are of much 

 assistance in enabling the reader to grasp the vast extent of the movement." — London 

 Spectator. 



New York:' I). APPLETON & CO., 72 Fifth Avenue. 



