r 



A Magazine of General Botany 



VOLUME 18 

 NUMBER 4 

 APRIL, 1915 



CONTAINING 



Atmometry and the Porous Cup Atmometer. III. 



Burton Edward Livingston 95 



The Flora of the Williams Division of the Tusayan National Forest, Virginia 

 A. D. Read 112 



Books and Current Literature 124 



Notes and Comment 128 



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, 1894 



