EDITORIAL COMMITTEE OF THE 



UNITED STATES DEPARTMENT OF AGRICULTURE AND 



THE ASSOCIATION OF AMERICAN AGRICULTURAL 



COLLEGES AND EXPERIMENT STATIONS 



FOR THE BEPARTMBNT 



KARtF. KELLERMAN, Chairman 



Physiologist and Assistant Chief, Bureau 

 of Plant Industry 



EDWIN W. ALLEN 



Chief, Office of Experiment Stations 



CHARLES L. MARLATT 



Entomologist and Assistant Chitfi Bureau 



of Entomology 



FOR THE ASSOCIATION 



RAYMOND PEARL * 



Biologist, Maine Agricultural Experiment 

 Station 



H. P. ARMSBY 



Director; Institute of Animal Nutrition; The 

 Pennsylvania State College 



E. M. FREEMAN 



Botanist. Plant Patbolojjist and Assistant 

 Dean, A griculturd. Experiment Station of 

 the University of Minnesota 



All correspondence regarding articles from the Department of Agriculture should be 

 addressed to Karl F. Kellerman, Journal of Agricultural Research, Washington, D. C. 



*Dr. Pearl has undertaken special work in connection with the war emergency; 

 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. 



