4 



26 



DIAGKAM III. 



Central Illinois, 397 Towns, 1887. Average Acreage in Wheat {A) and 

 Oafs (B) corresponding to Grades of Injury to all Crops. 



,0 



1 2 



3 



4. 



5 



6 



7 i 



^ Q 



10 



11 



12 



13 



14 



15 



16 



17 



18 



19 



20 



4000 











































3900 





















I 























3800 





















\ 























3700 





















T 























3600 



















i 



— J 























3500 









































3400 











































3300 











































3200 













1 































3100 













-\ 































3000 













"1 













\ 



















2900 



\ 























\ 



















2800 

























-V 



n 



















2700 

























-t\r 



















2600 











































2500 













— 2 







/ 

























2400 







»\ 













r— 



1 



i 



> 























2300 









A, 











1 





r\ 





















2200 







U-JI 





-N — 









1 



i 







\ 



















2100 

















V 1 



f / 

























2000 











A 

 I * 







1 

 1 



























1900 











\ ^ 







1 

 1 



























1800 













\ 































1700 

















If 



























1600 













\ 































1500 













\ 



V 





— f — 



4- 



























1400 

















1 



























1300 

















f 



1 



























1 200 

 110 0 

 1000 















^ — i 













































































































