Bui. 70, Bureau of Chemistry, U, S, Dept. Agr. 



Plate V. 



r 

 o 



> 



CO 



CO 



> 

 < 



> 



O 



30 



fn 

 m 



"0 

 r 

 > 



2 

 H 

 > 



H 

 O 



z 



z 

 o 



(Tl 

 X 



l- 



o 



c 



O 

 > 





CD 



O 



I 



o 



> 



z 

 n 

 I 



33 



C 

 Tl 



■n 

 > 



o 



H 

 O 

 3] 



o 

 > 



33 

 P 



o 



> 



