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EXPLANATION OF Fic. 1. 
A. Map of area surveyed—from Glencoe west to Shermerville, a 
distance, east and west, of three miles. The width of the map (north and 
south) represents one mile. 
1-36. Stations studied. 
37. Chicago, Milwaukee and St. Paul Railroad passing through 
Shermerville. 
38. Chicago and Northwestern Railroad cut-off. 
39. Chicago and Northwestern Railroad passing through 
Glencoe. 
40. Chicago and Milwaukee Electric Railroad. 
ae Large trees and virgin forest. 
? Shrubs and small trees. 
WII Swamp. 
B® Houses. 
— Roads. 
<...) Small ponds and pools. 
Unmarked spaces indicate open fields. 
This map is based on the Highwood topographic sheet of the United 
States Geological Survey. 
B. Profile section from Glencoe to Shermerville (the vertical scale 
is much exaggerated, in comparison with the longitudinal scale). 630, 
670, etc., altitudes above sea-level. 
East Arm of Skokie Bay. 
West Arm of Skokie Bay. 
Small bay west of Skokie Bay. 
Skokie Marsh. 
Intermediate Ridge. 
East Branch of the Chicago River. 
Glenwood Beach Ridge. 
North Branch of the Chicago River. 
See epee 
