PUBLISHED BY AUTHORITY OP/THE SECRETARY 

 OF AGRICULTURE, WITH THE COOPERATION 

 OF THE ASSOCIATION OF AMERICAN AGRICUL- 

 TURAL COLLEGES AND EXPERIMENT STATIONS 



EDITORIAL COMMITTEE 



FOR THE DEPAHTMEITT 



FOR THE ASSOCIATION 



KARL F. KELLERMAN, Chairman RAYMOND PEARL 



Physiologist otuI Assista^ii Chief, Bureau Biologist, M<^ine Agricultural Experiment 



of Plant Industry ' 



EDWIN W. ALLEN 



Assistant Director, OffUe of E%periment 

 Stations 



CHARLES L. MARLATT 



A ssistant Chi^f^ Bureau of Bntomoloay 



S,tation 



H. P, ARMSBY 



Director, Jvstiivie of Aniniol Nutrition^ The 

 Pennsylvania State' Colleoi^ 



E. M. FREEMAN 



Botanist, Plant Pathologist, and Assistant 

 Dean, Agricultural Experiment Station of 

 the Uiiiversily of Minnesota 



All correspondence regarding articles from tlie Department of Agriculture 

 should be addressed to Karl F. Kellertnan, Journal 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 



