Sewerage and Sewage Treatment

by Harold E. Babbitt

[115]. Technical Paper No. 117, U. S. Bureau of Mines.

[116]. Eng. News, Vol. 71, 1914, p. 84.

[117]. Eng. News, Vol. 71, 1914, p. 82.

[118]. Similar to definition proposed by the Am. Public Health Ass’n.

[119]. Economic Values in Sewage and Sewage Sludge, by Raymond Wells, Proceedings Am. Society Municipal Improvements, Nov. 12, 1919. Eng. News-Record, Vol. 83, 1919, p. 948.

[120]. Sample boiled for five minutes.

[121]. Sample immersed in boiling water for 30 minutes.

[122]. Four months.

[123]. One week in March, 1914.

[124]. R represents any chemical element such as K, Na, etc.