Vol. 22, Art. 6 
Ittinois NATURAL History SURVEY BULLETIN 
442 
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he shading, as shown in the key, indicates approxi- 
mately the areas that were in forest early in the nineteenth century. (After map by Vestal 1931, 
based on map by Telford 1926.) 
Vegetation map of Illinois. T 
Fig. 4 
