NATURE BOOKS 
OUR TREES 
HOW TO KNOW THEM 
Photographs from Nature 
By ARTHUR I, EMERSON 
With a guide to their recognition at any season 
of the year, and notes on their characteristics, dis- 
tribution, and culture 
By CLARENCE M. WEED, D.Sc. 
140 Illustrations 
Small Quarto Cloth, $3.00 Net. 
yi 
Birds in Their 
Relations to Man 
By 
CLARENCE M. WEED and NED DEARBORN 
Each family of birds is assigned the performance 
of certain special functions in the economy of 
nature, and it is to a study of these functions that 
this volume is devoted. The authors thoroughly 
outline the services rendered by the various bird 
families, making it clear at the same time that 
the investigation by which their information has 
been secured is the result of the closest scientific 
methods. 
Accurately and lavishly illustrated with full-page 
plates and drawings in the text. 
Cloth, $2.50 net. 
J. B. LIPPINCOTT COMPANY 
PUBLISHERS :: :: :: PHILADELPHIA 
