Report of the State board of health of Massachusetts on water-supply and sewerage : under the provisions of chapter 274, of the acts of 1886.

  • Massachusetts Department of Public Health
Date:
1888
Catalogue details

Licence: Public Domain Mark

Credit: Report of the State board of health of Massachusetts on water-supply and sewerage : under the provisions of chapter 274, of the acts of 1886. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    ceased; moreover, the chemical purity of the water in the tank is as great as at the source. A result corresponding to the last statement has been found under similar circumstances at several other places in the State similarly situated. The marked deterioration, as determined by chemical analyses, of ground water stored in large open reservoirs, is a feature in all cases that have been examined. The amount of deterioration is somewhat variable. Table No. 5 has been prepared to show the change due to stor- age that has taken place in six water systems during six months. The general result is the same as in the special case before given. The increase in the ammonias is even more max'ked. TA.BLE No. 5. Mean of Analyses made monthly from June to November^ 1887, of the ivaters of six filter galleries or tcells and of the corresponding open distrihuting reservoirs into ichich the tcater is pirimped from the filter galleries. [Figures express parts per 100,000.] Filter Galleries or Wells. Open Distributing Reservoirs. Sediment, .... None. A little. Turbidity None. Some. Color, None. None. Odor, cold,.... None. Some. Odor, hot, .... None. Some. Total residue, . 8.86 8.82 Loss of residue on ignition. 1.19 1.39 Fixed residue, . 7.67 7.43 Free ammonia, . 0.0004 0.0011 Albuminoid ammonia, 0.0017 0.0117 Chlorine, .... 1.13 1.09 Nitrogen as nitrates, . 0.088 0.064