IJ713 
7f£ 
i.3 
Tilt LIBRARY 
OF THE 
UNIVERSITY OF ILLINOIS 
Illinois State Laboratory 
OF 
Natural History 
■ A 
Urbana, Illinois, U. S. A. v#;- i ■ 
£ * 
* *• 
STEPHEN A. FORBES, Ph.D.; LE.D., 
Director 
BIOLOGICAL INVESTIGATIONS ON THE ILLINOIS RIVER 
1. THE WORK OF THE ILLINOIS BIOLOGICAL STATION 
l 
2. THE INVESTIGATION OF A RIVER SYSTEM IN THE 
INTEREST OF ITS FISHERIES 
BY 
STEPHEN A. FORBES 
1910 
