Vol XIII JUNE^ 24, 1918 No. 13 



JOURNAJvOF 



AGRICULTURAL 



RESEARCH 



CONTENTS AND INDEX 

 OF VOLUME XIII 



PUBUSHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE, 



WITH THE COOPERATION OF THE ASSOCIATION OF AMERICAN 



AGRICULTURAL COLLEGES AND EXPERIMENT STATIONS 



WASHINOXON, D. C. 



WAftHINQTON t GOVERNMENT PRINTINQ OFFICE I l»l( 



