573 



EXPLANATION OF PLATES 



Plate LXV 

 Upper Illinois River and principal tributaries. 



Plate LXVI 



Fig. I. Des Plaines River and Sanitary Canal at LoclcporL 

 Fig. 2. Illinois River at Marseilles. 



Plate LXVII 

 Illinois River at Morris. 



Plate LXVIII 

 Marseilles Dam, June 15, 1901. View from north end. 



Plate LXIX 

 Marseilles Dam, July 22, 1906. View from south end. 



Plate LXX 

 South bank of Illinois River, below Ottawa. 



Plate LXX I 

 In Horse-shoe Cafion, near Ottawa. 



Plate LXXII 

 Illinois River bluff, immediately above Starved Rock. 



Plate LXXIII 

 The Valley of the Illinois, from Starved Rock. 



Plate LXXIV 

 The Valley of the Illinois, from Prospect Heights, above Peoria. 



Plate LXXV 

 Sketch of waters near Havana, 191 1. 



Plate LXXVI 

 The Illinois River and bottom-land lakes, from Havana, 1910. 



Plate LXXVII 

 View of Flag Lake, 1910. 



Plate LXXVIII 

 Permanent overflow of Illinois River bottoms near Havana. 



Plate LXXIX 

 Characteristic views from the middle course of the lUinois. 



