EDITORIAL COMMITTEE OF THE 



UHITED STATES DEPARTMENT OF AGRICULTURE AND 



THE ASSOCIATION OF AMERICAN AGRICULTURAL 



COLLEGES AND EXPERIMENT STATIONS 



FOR THB DBPARTMBNT 



FOR THB ASSOCIATIOIC 



KARL F.KELLERMAN, Chairman RAYMOND PEARL* 



Physiote0st and AssodaU Chief, Burtou 

 of Plant Industry 



EDWIN W. ALLEN 



Chief, OJUte of Experiment SUUiofis 



CHARLES L. MARLATT 



Entomohgist and Assistant Ckkf.Bureoiu 

 of EnU>moio{iy 



Biologist, Maine Affriatltttrat Btp erimmf 

 Station 



H. P. ARMSBY 



Dirtdor, Institute of Animal Nutrition, Tkt 

 Pennsylvania State ColUff 



E. M. FREEMrVN 



Bctanist, Plant Pathologist and Atsistani 

 Dean, Agricvitural Experiment Station of 

 the University cf Minnesota 



All correspondence regarding articles from the Department of Agriculture should be 

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



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

 therefore, imtil fiuther notice all correspondence regarding articles from State Experi- 

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

 State College, Pa. 



