
INTRODUCTION. XVii 

sistance. Summer schools and vacation classes seem to meet 
a widespread want, and to take teachers and pupils away from 
the densely populated cities is better than to bring living plants 
and animals tothem. Therefore a book that leads searchers 
to know what they will find in the country is the best kind of a 
book. 
Our thanks are due to Miss Lounsberry and Mrs, Rowan for 
having contributed a work which cannot fail to advance Nature 
Study in quite the way that it should be advanced. Mrs, Row- 
an’s figures have been drawn from plants growing in their nat- 
ural surroundings and they are accurate and elegant. The 
new process by which it has been made possible to reproduce 
her coloured paintings is a most valuable addition to methods 
of illustration. 
N. L. BRITTON. 
New York BOTANICAL GARDEN, 
February 20, 1899. 
