30 
BULLETIN 681, U. S. DEPARTMENT OF AGRICULTURE. 
"E dH. 
J gjgjg _ _ 
° ft' 
CO®"© © 
5 co as <m 
■-Sea 
o 
•d . • 
B ®eh 
Jfg . 
43 "3 "E OT 
w. m 
■g So 
8" 
>d ft 
5 
S § 
I 
ofl 
I 
o 3 
Zft 
Zft 
= 53 
He 
8£ 
oa — 
II 
go 
si 
.iOC^CO O O I 00 O OlOJiOOIOlOO .OCC .-<■«*< tOSOCOS 
g r-i CO CO ■>*< lO O >0 « CN MffliOO'OON-HCWCO g "* M "* "^ •*-^-^^t 
