A Report ON THE LAKES OF THE TIPPECANOE BASIN.* 
WILL Scort. 
This paper presents the first section of the results of the survey of the 
Indiana lakes. The lakes herein described all lie in the Tippecanoe basin. 
This basin contains 1,890 square miles. The plan of the survey has been to 
construct a hydrographic map of the lakes; and to determine at critical 
levels the temperature together with the amount of oxygen, free carbon- 
dioxide, carbonates and plankton. 
The following lakes have been mapped: Manitou, Yellow Creek, Beaver 
Dam, Silver, Plew, Sawmill, Irish, Kuhn, Hammon, Dan Kuhn and Ridinger. 
Gas determinations and plankton collections have been made in the 
following lakes: Manitou, Yellow Creek, Pike, Eagle (Winona), Little 
Eagle (Chapman), Tippecanoe, Plew, Hammon (Big Barbee). 
All of the lakes in this basin have been caused by irregularities in the 
great Erie-Saginaw interlobate moraine which was formed by the Erie and 
Huron-Saginaw lobes of the Wisconsin ice sheet. The basins are either kettle 
holes, irregulatities in the ground moraine, channel lakes, or a combination 
of these. 
In the lakes that we have mapped the area varies from 85,084 sq. M. 
in Sawmill lake to 3,265,607 sq. M. in Manitou. The volume varies from 
284,716 cu. M.in the former to 9,787,024 cu. M. in the latter. Their maximum 
depth varies from 7.9 M. in Dan Kuhn lake to 22M. in Yellow Creek lake. 
The average depth of Dan Kuhn lake is 2.588 M. and that of Yellow Creek 
lake is 10 M. These are the maximum and the minimum for the lakes 
mapped. 
The bottom temperatures vary from 5.3° C. in Tippecanoe lake to 15° C. 
in Little Eagle (Chapman). The amount of wind distributed heat (. e. 
in excess of 4° C.) has been calculated in gram calories per square centimeter 
of surface. This varies from 5,361 gram calories in Manitou to 10,563 calories 
in Yellow Creek lake. 
The oxygen is always abundant in the epilimnion. In six observations 
it was found to exceed the saturation point at one or more levels. The 
*A complete report of this work, with maps, tables, and other data, will be pub- 
lished as the July number of the Indiana University Studies for 1916. 
