Public Document No. 31 



TWENTT-FOUETH ANNUAL EEPORT 



OF THE 



MASSACHUSETTS AGRICULTURAL 

 EXPERIMENT STATION. 



Part I., 



Being Part III. of the Forty-ninth Anntjal Report of the 



]\Iassachusetts Agricultural College. 



January, 1912. 



BOSTON: 



WEIGHT & POTTER PRINTING CO., STATE PRINTERS, 



18 Post Office Square. 



1912. 



