EXPERIMENT STATION BULLETINS. 



553 



^^ -^ C^l ^ 



•o 





CSIi. 



O&H Ca 



O C5 Cifc, tofe 



(J !i C5fe !i O CS&H 



St^ 



H 



2 

 O 



c 

 tn 



o 

 O 





Mffl 



^^^ 



<<! 



.2 « s 

 Cog 



i2 o I 



m 



cO a 



m ShS 



fe =: 



pa 



-a 

 3 



j3 

 Ph 



O 



CQ 



a I 



fe 



13 f^ 



o o 



o 



JJ o 



1:6- 



<;<-i; 



