I«0ued i>ecember 31, 19^ 



U. S. DEPARTMENT OF AGRICULTURE 



OFFICE OF EXPERIMENT STATIONS 

 A. C. TRUE, DIRECTOR 



Vol. XXXI 



ABSTRACT NUMBER 



No. 9 



EXPERIMENT 



STATION 



RECORD 



WASHINOTON 



GOVIRNMENT PRINTIN© GFHCl 



i9U 



