104 



KANSAS UNIVERSITY SCIENCE BULLETIN. 



Table V 

 above 

 (Parts 



— Analyses of water from the Kansas river, collected about 100 feet 

 the dam at Lawrence, filtered through paper before making tests. 

 per 1,000,000.) 



These analyses were made on dates corresponding to those of 

 table I. It will be noted that the same variations occur as in the 

 unfiltered water, but the solids do not show such a wide range. 

 It is easy to find the amount held in suspension, if the solids in 

 the filtered water be subtracted from the amount in the unfil- 

 tered. The decrease in the amount of oxygen consumed and in 

 the amount of nitrogenous constituents shows that a large 

 amount of the nitrogen is in the suspended matter. 



