Public Document 



No. 31 



TWENTIJiafflLANNUAL REPORT 



MASSACHUSETTS AGRICULTURAL 

 EXPERIMENT STATION. 



I 



Being Part III. of t!&u FtjSt^ -liighth Annual Report 

 OP THE Massachusetts Agricultural College. 



Jandtary, 1911. 



BOSTON: 



WEIGHT & POTTER PRINTING CO., STATE PRINTERS, 



18 Post Office Square. 



1911. 



