94 KANSAS UNIVERSITY QUARTERLY. 



The test for nitrites was made by the use of napthylanimonium 

 chloric! and sulfanilic acid. The characteristic pink color developed 

 in the jjresence of nitrites was compared with that produced in a 

 solution of sodium nitrite of known strength. Of course in the 

 method above described the nitrates and nitrites were determined 

 together, and the nitrites being determined, the nitrates were found by 

 difference. 



Analyses. 



In each case we give the mineral analysis in parts per 100,000, 

 followed by the probable combination in which the elements occur. 

 In some cases the sodium was calculated. In all these waters it is 

 probable that the small quantity of iron present exists in the solution 

 as bicarbonate. Following the mineral analysis is what is usually 

 termed the " sanitary analysis," the organic matter being estimated 

 both by the nitrogen and carbon found by combustion and that shown 

 by the free and albuminoid ammonia method.* 



SMOKY HILL RIVER. 



Sodium oxid, calculated 34.56 



Chlorin 22.9.1 



Sulfuric anhyrid 20.91 



Carbonic anhydrid, calculated 12.00 



It is probable that the above constituents are combined in the 

 following manner: 



Silica and insoluble residue . . 2.08 Magnesium carbonate, 9.S7 



Iron and alumina oxids 0.70 Sodium chlorid. 37.78 



Calcium sulfate 26.25 Sodium sulfate 9.71 



Calcihm carbonate 16.16 



SANITARY ANALYSIS. 



Total solids 101.7000 Nitrogen as nitrates and ni- 



Organic carbon 0.6080 trites 0.0080 



Organic nitrogen 0.1500 Nitrogen as nitrites 0.0015 



Free ammonia 0.0040 Total combined nitrogen 0.1613 



Albuminoid ammonia 0.0116 Chlorin 22.9.300 



SALINE RIVER. 



Total solids 232.30 Sodium oxid, calculated 87.17 



Silica and insoluble residue . . 2.44 Chlorin 85 85 



Iron and alumina oxids 0.50 Sulfuric anhydrid 85.02 



Calcium oxid 19.54 Carbonic anhydrid, calculated 24.91 



Magnesium oxid 7.78 



* In this and all other cases below most of the calcium ana magnesiiiir, when not in 

 aolution as stilfate, is present as biqarbonate. 



