PicOCERE DINGS 
OF THE 
Ohio State Academy of Science. 
Vol. IV, Part 4. 
Ecological Study of Brush Lake, 
BY 
JOHN H. SCHAFFNER, OTTO E. JENNINGS and 
FREDRICK J: fYLER, 
Sic ALT PAPERS. Noe: 10, 
PUBLICATION COMMITTEE: 
JOHN H. SCHAFFNER, JAMES S. HINE, GERARD FOWKE. 
Columbus, Ohio, December 1, 1904. 
COLUMBUS, OHIO: 
SPAHR & GLENN, PRINTERS. 
1904. 
