EXPERIMENT STATION BULLETINS. 



3§:i 



1 



CO 





I- 



60 



S 



1=3 

 S 



o 



3 



Oh 



8 



•2 





o 

 n 



o 



X5 





+ 



•3 



>^ 



O 

 ■♦-» 



O 

 CI 



.2 



3 



