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A Report on the Lakes of the Tippecanoe Basin.* 



Will Scott. 



This paper presents the first section of the results of the survey of the 

 Indiana lakes. The lakes herein described all he 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, irregularities 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 22 M. in YeUow 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 (i. 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,. r >(>3 calories 

 in Yellow Creek Jake. 



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 191(5. 



