PUBLISHED BY AUTHORITY OF THE SECRETARY 

 OF AGRICULTURE, WITH THE COOPERATION 

 OF THE ASSOCIATION OF AMERICAN AGRICUL- 

 TURAL COLLEGES AND EXPERIMENT STATIONS 



EDITORIAL COMMITTEE 



FOR THE DEPARTMENT 



FOR THE ASSOCIATION 



KARL F. KEIXERMAN, Chairman RAYMOND PEARL 



Physiologist and Assistant Chief, Burea 

 of Plant Industry 



EDWIN W. ALLEN 



Chief, Office of Experiment Stations 



CHARLES L. MARLATT 



Assislatit Chief, Bureau of Entomology 



Biologist, Maine Agricjiltural Experiment 

 Station 



H. P. ARMSBY 



Director, Institute of Am}>tal Nutrition, The 

 Pennsylvania State Collegi 



E. M. FREEMAN 



Botanist. Plant Pathologic!, and Assistant 

 Dean, Agricultural Experiment Station of 

 the University of Minnesota 



All correspondence regarding articles from the Department of Agriculture 

 should be addressed to Karl F. Kellerman, JoiuTial of Agricultural Research, 

 Washington, D. C. 



All correspondence regarding articles from Experiment Stations should be 

 addressed to Raymond Pearl, Journal of Agricultural Research, Orono, Maine. 



