25 



DIAGRAM II. 



Southern Illinois, 191 Towns, 1887. Average A creage in Grass ( A ) and 

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





0 



1 



2 



3 



4r 



5 



6 



7 



8 



9 



10 



11 



12 



13 1 



4 15 



16 



17 



18 



19 



20 



4000 











































3900 











































ooOO 











































o700 











































3600 











































3500 











































3400 











































o vt rk r\. 

































V- 



\ 











3200 

































> 











3100 

































A 



y 









3000 

































f 









2900 



































r 









2800 











































2700 

























4 



















2600 























V- 



4 



















2500 























A 







—- 1 

 / 















2400 





























> 



-4 













2300 































Y 













2200 



























-ft 

















2100 



























1 / 



V 















2000 











































1900 











































1800 













V 































1700 











































1000 











































IffOO 









































1400 











-E 

































1300 













1 































1200 











































1100 











































1000 



























\ 

















