G TECHNICAL BULLETIN 134, U. S. DEPT. OF AGRICULTURE 
X3 
o 
So 
to 
C O 
o 
> 
GO OO 00 (30 00 ' 
•—So® 
o o 
•CO o o 
: 1^^ 
o o o o o oi2 o o o 
I ; . 
O O O^j 
I to . 
S 3 
-O 03 CO O O O O 
OOCOboOOOOOOOOOOO 
Ta-co <» 3 1 1 — 
! 1 : Q<j 
= Isle's 
OQOO DQOO OOOOOODOQOO QcQ OJ 
oa 
O O O f3 
ddddo'xijdddt; 
; CO CO cc CO cc CO co 
