36 
BULLETIN 681, IT. S. DEPARTMENT OF AGRICULTURE. 
§!§§■ 
c - - 
S W »> C rr" • 
i^iiili 
"tf X 
^-.x 
§2 
0£ 
IH C ' 
e . -^ 
■s 5 . 
S £CQ 
so" 
Pi., g 
0S,®.2 
£^0 
