es MICROSCOPES 
of every size, style and price, suited 
for all kinds of work. 
A new series of lenses 
for dissecting work have 
recently been perfected by 
us which have unusually 
long working distance and 
large flat field. These 
lenses are offered at 
prices less than any lenses of equal quality heretofore 
in use. The new Dissecting Stands are all nickeled 
metal with glass stage. I@~ Catalog free. 
Sample copy JOURNAL OF APPLIED MICROSCOPY on request. 
BAUSCH & LOMB OPTICAL CO. 
NEW YORK OFFICE: CHICAGO OFFICE: 
25th Street and Broadway, ROCHESTER, N. Y. State and Washington Streets, 
Townsend Bldg. Stewart Bldg. 
CAMBRIDGE BOTANICAL SUPPLY COMPANY 
1286 Massachusetts Avenue = = = = = Opposite College Library, 
CAMBRIDGE, MASS. 
Lens Holder Anatomica ork. 
. COLLECTING BOXES. DRIERS. MOUNTING PAPER. 
PLANT MATERIAL FOR LABORATORY CLASSES. 
BOOKS (32-page catalogue). BIBLIOGRAPHY OF AMERICAN BOTANY. 
CONSULTING LIBRARIES. COPYING. MICROSCOPES AND SUPPLIES. 
NEW CATALOGUE, 1899. 
EVERYTHING USEFUL TO BOTANISTS. 
PUBLICATIONS OF THE UNIVERSITY OF PENNSYLVANIA 
E ON THE 
By the late Proressor E. D. COPE. 
svo. Cloth, $1.25; paper, $1.00. | 
BOSTON, GINN & ee AGENTS. : 
