Vol. VI SEPTEMBER IX, 1916 No. 23L 



JOURNAL OF 



AGRICULTURAL 

 RESEARCH 



CONTENTS 



Page 



Progressive Oxidation of Cold-Storage Butter - 927 



D. C. DYER 



Bacteriological Studies of a Soil Subjected to Different 

 Systems of Cropping for Twenty-Five Years - 953 



P. L. GA1NEY and W. M. GIBBS 



DEPARTMENT OF AGRICULTURE 



"WASHINGTON, D.C 



WASHINGTON : OOVERNMENT PAINTING OFFICE : 1018 



