Public Document No. 31 



THIRTIETH AMUAL REPORT 



OF THK 



MASSACHUSETTS AGRICULTURAL 

 EXPERIMENT STATION. 



Parts I. and II., 



Being Parts III. and IV. of the Fifty-fifth Annual Report of the 

 Massachusetts Agricultural College. 



January, 1918. 



Ending the Thirty-fifth Year from the Founding of the State 

 Agricultural Experiment Station. 



BOSTON: 



WRIGHT & POTTER PRINTING CO., STATE PRINTERS, 



32 DERNE STREET. 



1918. 



