27 
DIAGRAM IY. 
Northern Illinois, 224 Towns, 1887. Average Acreage in Wheat corre¬ 
sponding to Grades of Injury to all Crops. 
0 
1 
0 
3 
4 
5 
6 
7 
8 
9 
to 
1 1 
12 
13 
14 
15 
36 
11 
18 
19 
20 
1000 
900 
800 
700 
600 
fs. 
500 
■ - - 
A 
— — 
A 
A 
Aj 
400 
300 
lZ 
V 
n 
200 
* 
100 
h 
