Bui. 607, U. S. Dept. of Agriculture. 
Plate VIII. 
CM 
. _*- ami ~i 
i 
ok 
C 03 
13 ft 
OS 
t3 M 
a; »5 
CO ^ 
6 oo 
3 g 
O 35 
!h 05 
05, 
5 
(ceq 
o 
LlJ 
a> 3 
0. 
CO 
oS 
u 
©"« 
o 
z 
O"^ 
< 
§ o 
E 
Si 05 
h 
ort 
Ul 
z 
^Eh 
UJ 
CL 
£>n 
05 
C50,Q 
£.3 
^ 
i**~ 
.3 05 
C3 M 
