Public Document No. 31 



TWENTY-SECOND ANNUAL EEPORT 



OF THE 



MASSACHUSETTS AGRICULTURAL 

 EXPERIMENT STATION. 



Part L, 



Being Paet III. of the Forty-seventh Annual Eeport 

 OF the Massachusetts Agricultueal College. 



January, 1910. 



BOSTON: 



WEIGHT & POTTEE FEINTING CO., STATE PEINTEES, 



18 Post Office Sqijaee. 



1910. 



