Public Document 



No. 31 



TWENTY-FIRST ANNUAL REPORT 



MASSACHUSETTS AGRICULTURAL 

 EXPERIMENT STATION. 



Part L, 



Being Part III. of the Forty-sixth Annual Report 

 OF THE Massachusetts Agricultural College. 



Januaky, 1909. 



BOSTON: 

 WRIGHT & POTTER PRINTING CO., STATE PRINTERS, 



18 Post Office Square. 

 1909. 



