^^■ 



A Journal of General Botany 



VOLUME 21 

 NUMBER 3 



MARCH, 1918 



\p}. 



i 



V*' 



CONTAINING 



Raunkiaer's "Life Forms," "Leaf-Size Classes," and Statistical Methods 

 George D. Fuller and A. L. Bakke 57 



The Evaluation of the Soil Temperature Factor in Root Growth. W. A. 



Cannon ^ 64 



Books and Current Literature 68 



Notes and Comment 70 



PUBLISHED MONTHLY 



OFFICE OF PUBLICATION 



2419-21 Greenmount Ave. 



baltimore, md. 



EDITORIAL OFFICE 



TUCSON, ARIZONA 



Bntoped m •ooond-olaes matter March 9, 1912. at the post office at Baltimore, Maryland, under the act of July 19. 1894 



