I02 KANSAS UNIVERSITY QUARTERLY. 



with that of other streams that flow through similar regions, with that 

 of the Great Lakes and rivers, it is evident that they all belong to the 

 same general class. Many of these waters must, for the present, be 

 used as sources of city supply. They are capable of much improve- 

 ment by sedimentation and by filtration, as this remoxes much of the 

 suspended silt and organic material. These waters have been in use, 

 for a series of years, with impunity, notwithstanding the large amount 

 of organic material that they contain, and it has not yet been dem- 

 onstrated that this use is detrimental to health. 



