A' 

 ¥ 



A Journal of General Botany 



VOLUME 2 2 

 NUMBER 6 



JUNE, 1919 



CONTAINING 



Sunlight and its Measurement. Howard E. Pulling 151 



The Role of Temperature in the Determination of the Transpiring Power 

 of Leaves by Hygrometric Paper. Edith Bellamy Shreve 172 



Books and Current Literature 181 



Notes and Comment 184 



PUBLISHED MONTHLY 



OFFICE OF PUBLICATION 



2419-21 Greenmount Ave. 

 baltimore,. md. 



EDITORIAL OFFICE 



TUCSON, ARIZONA 



Entered as second-class matter March 9, 1912, at the post office at Baltimore, Maryland, under the act of July 16, 1801 



