Vegetational Map of Illinois. The boundaries of the principal geo- 

 graphical divisions of the state are indicated by solid lines, and their subdivisions 

 by broken lines. Shading, as shown in the key, indicates approximately the areas 

 that formerly were forested. (Reproduced by permission from A. G. Vestal's 

 map of 1930, which was based on C. J. Telford's map in Illinois Nat. Hist. 

 Surv. Bull. vol. 16, 1926.) 



VI 



