It is designed to continue the examination of Sioux City waters each year for a series of years, and thereby collect valuable data which may be of service in the future. It is yet too soon to draw many general conclusions with sufficient certainty. It will be observed by comparison with last year's results that the analyses of the city water resulted much better this year. The albuminoids ammonia and nitrates have been very much reduced, and the free ammonia entirely disappeared.
Proceedings of the Iowa Academy of Sciences
©1902 Iowa Academy of Science, Inc.
Cook, Alfred N. and Morgan, W. J.
"The Sioux City Water Supply II,"
Proceedings of the Iowa Academy of Science, 10(1), 122-123.
Available at: https://scholarworks.uni.edu/pias/vol10/iss1/22