VOLUME 18 

 NUMBER 1 

 JANUARY, 1915 



CONTAINING 



The Relative Transpiration of White Pine Seedlings 



George P. Burns 1 



An Improved Non-Absorbing Porous Cup Atmometer 



JohnW. Stave 7 



A Manometer Method of Determining the Capillary Pull of Soils 



W. A. Cannon 11 



Books and Current Literature 14 



Notes and Comment 20 



PUBLISHED MONTHLY 



OFFICE OF PUBLICATION 

 2419-21 Greenmount Ave. 



BALTIMORE, MD. 



EDITORIAL OFFICE 



TUCSON, ARIZONA 



Entered as seoond-class matter March 9, 1912, at the poet office at Baltimore, Maryland, under the Act of July 16, 1894 



