Public Document 



No. 31 



TWENTY-SECOND ANNUAL KEPORT 



OF THE 



Massachusetts Agricultural 

 Experiment Station. 



Part IL, 



Beiivg Part IY. of the Forty-seventh Annual Report 

 OF THE Massachusetts Agricultural College. 



Januaky, 1910. 



BOSTON : 



WEIGHT & POTTER FEINTING CO., STATE PRINTEES, 



IS Post Office Square. 



1910. 



