“Any one with even a smattering of botanical knowledge, and with either a heart or mind, must be charmed with this collection of essays.”—Chicago Evening Journal.

THE GEOLOGICAL HISTORY OF PLANTS. By Sir J. William Dawson, F.R.S. Illustrated. 12mo. Cloth, $1.75.

“The object of this work is to give, in a connected form, a summary of the development of the vegetable kingdom in geological time. To the geologist and botanist the subject is one of importance with reference to their special pursuits, and one on which it has not been easy to find any convenient manual of information. It is hoped that its treatment in the present volume will also be found sufficiently simple and popular to be attractive to the general reader.”—From the Preface.

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 not a page that is not instructive and suggestive. It is sure to make a reputation abroad 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 its 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 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., Canon of Chester. 12mo. Cloth, $1.50.