"Though a fact familiar to botanists, it is not generally known hew great is the uncertainty as to the origin of many of the most important cultivated plants. ... In endeavoring to unravel the matter, a knowledge of botany, of geography, of geology, of history, and of philosophy is required. By a combination of testimony derived from these sources M. de Candolle has been enabled to determine the botanical origin aid geographical source of the large proportion of species he deals with."--_The Athenæum_. _THE FOLK-LORE OF PLANTS._ By T. F. Thiselton Dyer, M. A. 121110. Cloth, $1.50. "A handsome and deeply interesting volume.... In all respects the book is excellent. Its arrangement is simple and intelligible, its style bright and alluring.... To all who seek an introduction to one of the most attractive branches of folk-lore, this delightful volume may be warmly commended."--_Notes and Queries_. _FLOWERS AND THEIR PEDIGREES._ By Grant Allen, author of "Vignettes of Nature," etc. Illustrated. 12mo. Cloth, $1.50. "No writer treats scientific subjects with so much ease and charm of style as Mr. Grant Allen. The study is a delightful one, and the hook is fascinating to any one who has either love for flowers or curiosity about them."--_Hartford Courant_. "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_. New York: D. APPLETON & CO., 72 Fifth Avenue. * * * * * D. APPLETON & CO.'S PUBLICATIONS. _IDLE DAYS IN PATAGONIA._ By W. H. Hudson, C. M. Z. S., author of "The Naturalist in La Plata," etc. With 27 Illustrations. 8vo. Cloth, $4.00. "Of all modern books of travel it is certainly one of the most original, and many, we are sure, will also find it one of the most interesting and suggestive."--_New York Tribune_.