STATE OF ILLINOIS 
Henry Horner, Governor 
DEPARTMENT OF REGISTRATION AND EDUCATION 
John J. Hallihan, Director 
LAKE MANAGEMENT REPORTS 
2. Fork Lake near Mount Zion, Illinois 
David H. Thompson’ 
and 
George W. Bennett 
NATURAL HISTORY SURVEY 
Theodore H. Frison, Chief 
Biological Notes No. 9 Urbana, Illinois January, 1939 
