UNIVERSITY OF IOWA STUDIES 

 IN NATURAL HISTORY 



Professor Charles Cleveland Nutting, M. A., Editor 



Continuation of Bulletin from the Laboratories of Natural History of 

 the State University of Iowa 



Volume IX Number 1 



A LIMNOLOGICAL RECONNAISSANCE OF 

 WEST OKOBOJI 



by 

 E. A. BIRGE and CHANCEY JUDAY 



published by the university, IOWA CITY 



