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. 12mo. Cloth, 60 cents. 
The Origin of Floral Structures through Insects 
and Other Agencies. 
By the Rev. Grorce Henstow, Professor of Botany, 
Queen’s College, London. (International Scientific Series.) 
With numerous illustrations. rzmo. 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 
@ priort 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. Marsuatt Warp, M.A, F.R.S., F.L.S. With 
53 illustrations. r2mo. 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. APPLETON AND COMPANY, NEW YORE. 
