iU^^ 





A Magazine of General Botany 



VOLUME 20 

 NUMBER 3 _ 

 MARCH, 1917 



CONTAINING 



The Effect of Surface Films of Bordeaux Mixture on the Foliar Trans- 

 piring Power in Tomato Plants. 

 John W. Shive and William H. Martin 67 



Seeding Habits of Spruce as a Factor in the Competition of Spruce 

 with its Associates. 

 Louis S. Murphy 87 



Books and Current Literature 91 



Notes and Comment 95 



PUBLISHED MONTHLY 



OFFICE OF PUBLICATION 



2419-21 Greenmount Ave. 



baltimoiie, md. 



EDITORIAL OFFICE 



TUCSON, ARIZON.^ 



Entered as eeoond-clase matter March 9. 1912, at the post oflSce at Baltimore, Maryland, under the Act of July 16, 1894 



