BOTANY. 



The Plant World : Its Romances and Realities. 



A Reading-Book of Botany. Compiled and Edited 

 by Frank Vincent, M.A., author of '' Actual Africa," 

 "Around and About South America," etc. (Appletons' 

 Home-Reading Books.) Illustrated. i2mo. Cloth, 60 cents. 



The Origin of Floral Structures through Insects 

 and Other Agencies. 



By the Rev. George Henslow, Professor of Botany, 

 Queen's College, London. (International Scientific Series.) 

 With numerous illustrations. i2mo. Cloth, $1.75. 



" The object of this work is to endeavor to refer every part of the 

 structure of flowers to some one or more definite causes arising from the 

 environment taken in its widest sense. To some extent the attempt 

 must be regarded as speculative ; and, therefore, any deductive or 

 d priori reasonings met with must be considered by the reader as being 

 suggestive only." — The Author. 



The Oak: A Popular Introduction to Forest- 

 Botany. 



By H. Marshall Ward, M.A., F.R.S., F.L.S. With 



53 illustrations. i2mo. Cloth, $1.00. 



As so often happens in the study of science, we have in the oak a 

 subject for investigation which presents features of intense interest at 

 every turn. It will be found that the story of the oak as an object of 

 biological study is at least not less fascinating than its folk-lore. 



D. APPLE TON AND CO M PANY, NEW YORK 



