Marine Biological Laboratory 
WOODS HOLE, MASS. 
SUPPLY DEPARTMENT-Open the Entire Year 
Animals and plants, preserved, living, and in embryonic 
stages. Preserved material of all types of animals and of 
Algae, Fungi, Liverworts and Mosses furnished for class- 
work, or for the museum. Living material furnished in 
season as ordered. Microscopic slides in Zoology, Botany, 
Histology, Bacteriology. Catalogues of Zoological and 
Botanical material and Microscopic Slides sent on appli¬ 
cation. State which is desired. For catalogues and all 
information regarding material 
ADDRESS 
GEORGE M. GRAY, Curator 
Woods Hole, Mass. 
METHYLENE BLUE 
CERTIFIED 
By 
Commission on Standardization of Biological Stains 
BIOLOGICAL STAINS—STAINING SOLUTIONS—CHEMICALS 
of Unexcelled Quality 
EMPIRE BIOCHEMICAL COMPANY 
16-22 Hudson Street 
New York City 
Always mention the JOURNAL OF BOTANY when answering our advertisements. 
