PREFATORY NOTE 



The following report is the result of a summer's work 

 done in connection with the Biological Station of the Indiana 

 University at Lake Winona, Ind. The locality is a hydro- 

 graphic basin representing a physiographic and ecological 

 unit, and for that reason is one well adapted for a study. Dur- 

 ing the first part of the summer, the class in ecology under 

 Dr. H. C. Cowles, of the University of Chicago, had for their 

 work the tracing of the natural history of the locality along 

 ecological lines, and also to show what was going on at that 

 time in the same line. It was while this work was in progress 

 that evidences were discovered in the physiographic history 

 which seemed to the writer extremely interesting. Accord- 

 ingly, the physiography was incorporated with the ecology in 

 the report. 



Return is here made for the co-operation of the other 

 members of the class: Miss Belle Highlands, of Madison, Ind., 

 Miss Lucy Youse, of Terre Haute, Ind., and Mr. Collett, of 

 Zenia, Ohio. To his instructor, Dr. Cowles, the author feels 

 deeply indebted, not only for aid in the present effort, but for 

 kindly guidance and suggestions which have characterized 

 their class associations for the past few years. No one has 

 done more to impart courage to the novice or to lift the be- 

 ginner toward professional work than he. 



Chicago, III., November 75, 1901. 



