EDITORUL COMMITTEE OF THE 



UNITED STATES DEPARTMENT OF AGRICULTURE AND 



THE ASSOCIATION OF AMERICAN AGRICULTURAL 



COLLEGES AND EXPERIMENT STATIONS 



FOR THE DEPARTMENT 



KARL F. KEI/LERMAN, Chairman 



Physiologist and Associate Chief , Bureau 

 of Plant Industry 



EDWIN W.AXtEN 



Chief, Ojfflce of Experiment Stations 



CHARLES L. MARLATT 



Entomologist and Assistant Chief, Bureau 

 of Entomology 



FOR THE ASSOCIATION 

 RAYMOND PEARL* 



Biologist, Maine Agrictdtural ExperinunI 

 Station 



H. P. ARMSBY 



Director, Institute of Animal Nutrition, The 

 Pennsylvania State College 



E.M. FREEMAN 



Botanist, Plant Pathologist 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, JoiU"nal of Agricultural Research, Washington, D. C. 



*Dr. Pearl has undertaken special work in connection with the war emei^ency; 

 therefore, until further notice all correspondence regarding articles from State Experi- 

 ment Stations should be addressed to H. P. Armsby, Institute of Animal Nutrition, 

 State College, Pa. 



