Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
[Report of the Medical Officer of Health for Hanover Square, The Vestry of the Parish of Saint George]
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Table XVI.
Showing the results of Mr. Cassal's Analyses of the Water supplied by the Grand Junction and Chelsea Water Companies, from January to December, 1900:—
Date of Collection | Jan. 16 th | Feb. 17th | March 23rd | April 23rd | May 18th | June 21st | July 31st | Aug. 23rd | Sept. 20th | Oct. 30th | Nov. 22nd | Dec. 10th | Average | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
j Grand Junction Company's Water | Total Solid Matters | 32.0 | 30.0 | 36.0 | 36.0 | 30.0 | 31.0 | 32.8 | 28.0 | 30.0 | 28.0 | 28.0 | 32.0 | 31.2 | Parts per 100,000. |
Chlorine | 2.0 | 1.9 | 1.08 | 1.8 | 1.8 | 1.8 | 2.0 | 1.8 | 2.0 | 1.85 | 2.1 | 1.9 | 1.89 | ||
Equivalent to Common Salt | 3.29 | 3.13 | 2.96 | 2.96 | 2.96 | 2.96 | 3.29 | 2.96 | 3.29 | 3.04 | 3.46 | 3.13 | 3.12 | ||
Saline Ammonia | 0.010 | 0.008 | 0.008 | 0.008 | 0.008 | 0.008 | 0.008 | 0.008 | 0.008 | 0.008 | 0.008 | 0.008 | 0.008 | Parts per Million. | |
Organic Ammonia | 0.118 | 0.102 | 0.106 | 0.092 | 0.090 | 0.088 | 0.106 | 0.098 | 0.092 | 0.082 | 0.10 | 0.090 | 0.089 | ||
Chelsea Company's Water | Total Solid Matters | 32.0 | 28.0 | 36.0 | 32.0 | 28.8 | 29.0 | 31.2 | 28.4 | 28.0 | 28.0 | 26.0 | 34.0 | 30.1 | Parts per 100,000. |
Chlorine | 2.0 | 1.9 | 1.8 | 1.8 | 1.8 | 1.8 | 2.0 | 1.8 | 2.0 | 1.85 | 2.1 | 1.9 | 1.89 | ||
Equivalent to Common Salt | 3.29 | 3.13 | 2.96 | 2.96 | 2.96 | 2.96 | 3.29 | 2.96 | 3.29 | 3.04 | 3.46 | 3.13 | 3.12 | ||
Saline Ammonia | 0.010 | 0.008 | 0.008 | 0.008 | 0.008 | 0.008 | 0.008 | 0.008 | 0.008 | 0.008 | 0.008 | 0.008 | 0.008 | Parts per Million. | |
Organic Ammonia | 0.100 | 0.102 | 0.108 | 0.094 | 0.088 | 0.086 | 0.094 | 0.090 | 0.090 | 0.084 | 0.092 | 0.088 | 0.085 |