FIG. 452. MAP OF REGION ABOUT SOUTH END OF LAKE MICHIGAN, AND \x 



The Dune areas are dotted in. This territory really occupies a larger area about Lake Calumet an> 

 the purposes of this book. *This sign indicates the Tamarack bog. Electric lines are thus shown 



A few of the main automobile roads out of Chicago are shown by a single line . Theyl 



map correspond to the numbers on the inset map, which indicates how the city streets connect up with 1 



