Public Document No. 31 



TWENTY-THIRD ANNUAL REPORT 



OF THE 



MASSACHUSETTS AGRICULTURAL 

 EXPERIMENT STATION. 



Part I., 



Being Part III. of the Forty-eighth Annual Report of the 

 Massachusetts Agricultural College. 



January, 1911. 



BOSTON: 



WRIGHT & POTTER PRINTING CO., STATE PRINTERS, 



18 Post Office Square. 



1911. 



