IOWA ACADEMY OF SCIENCES. 99 



ANALYSIS II. 



Total solids 406. 



Loss on ignition 159. 



Nitrogen as free ammonia .024 



Nitrogen as albuminoid ammonia .061 



Nitrogen as nitrates 9.1 



Nitrogen as nitrites Trace 



Chlorine 8.2 



Oxygen consuming power .685 



The following analysis was made by Prof. Floyd Davis, 

 chemist of the Iowa State Board of Health in April, 1891. 

 The specimen was obtained from pumping station No. 1. 



Total solids 393. 



Loss on ignition 61.2 



Chlorine 4.634 



Free ammonia .021 



Albuminoid ammonia .024 



Nitrogen as nitrates .735 ' 



Nitrogen as nitrites None 



The following analysis of a specimen from pumping 

 station No. 2 was also made by Dr. Floyd Davis at the 

 same time as the specimen mentioned above. He states 

 that "This sample of water contained a large amount of 

 suspended matter in it and the analysis was made of the 

 filtered water." The water from the station is now only 

 occasionally used for the city supply. It will be observed 

 that the results of the two analyses are practically the 

 same. 



Total solids 415.2 



Loss on ignition. .. 69.6 



Chlorine 3.6 



Free ammonia .021 



Albuminoid ammonia .045 



Nitrogen as nitrates Trace 



Nitrogen as nitrites None 



The two following technical analyses were made by Mr. 

 Davis at the same time as the sanitary analyses: 



PUMPING STATION No. 1. 



Silica (SiOc.) 32.43 



Sodium oxide (Na^O) 14.53 



Potasssium oxide (KaO) 5.91 



Sulphur trioxide (SOs) 9.55 



