Saint Louis Biological Laboratory 
Makers of lantern and microscope slides, collectors of plant and animal 
material and dealers in all kinds of supplies for the 
biological laboratory 
Special sets of lantern slides on 
PLANT MORPHOLOGY, PLANT ECOLOGY, ANIMAL EVOLUTION, 
ANIMAL MORPHOLOGY, ANIMAL ECOLOGY, TREES and 
FORESTS, BIRDS and THEIR CHARACTERISTICS, 
INSECT and WIND POLLINATION, GEN- 
ERAL PHYSIOGRAPHY, PHYSIO- 
GRAPHIC ECOLOGY 
General and Special Sets of Microscope Slides in Botany, Zoology 
and Physiology. 
Our Catalogue will prove a valuable addition to your library 
Address Saint Louis Biological Laboratory Dept. j. 
Zoological and Botanical Supplies — All Kinds 
Biological Specimens— Every Description 
Instruments for Plant Physiology 
Field and Herbarium Equipment 
of Standard Stock 
Driers, Mounting Papers, Genus Covers, Plant Presses 
( Samples of Papers Mailed on Request ) 
Microscopical Accessories of Highest Grade 
COMPLETE LABORATORY EQUIPMENT— Physics, Chemistry, Botany 
CAMBRIDGE BOTANICAL SUPPLY COMPANY 
3 Lexington Street WAVERLEY, MASS. 
Always mention the JOURNAL OF BOTANY when answering our advertisements. 
