Water supply : considered mainly from a chemical and sanitary standpoint / by Wm. Ripley Nichols.

  • William Ripley Nichols
Date:
1883
Catalogue details

Licence: Public Domain Mark

Credit: Water supply : considered mainly from a chemical and sanitary standpoint / by Wm. Ripley Nichols. Source: Wellcome Collection.

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    following table.* Here the Kent water, alluded to as having a uniform temperature at its source, appears, when delivered, as variable as the water of the Thames. He asserts f that the general mortality in London from diarrhoea is practically the same in the districts supplied from the rivers as in those supplied by the Kent Water Company, but that the water in the latter region does not reach its highest temperature until later in the season, owing to the advantage which the lower initial tempera- TABLE X.—Temperature of London Water Supplies. [The degrees are Centigrade.] Date. July, 187S August, September, October, November, December, January, 1879 February, March, April, May, June, Kent Company's Water. Thames In the wells. Water in In the mains. the Mains. 10.59 16.80 18.39 IO.67 16.62 17.70 10.71 14.78 14.92 IO.68 12. go 12.87 IO.61 8.17 7-47 IO.50 5.98 5-14 1 I0.45 5.06 4-77 IO.40 5-45 5-72 10.35 6.30 7.20 IO.44 8.38 8.20 IO.42 9- 36 10.20 10.57 12.63 14.25 The Ground at a depth of meters 0.838. 17.66 17.16 15-28 12.53 6.98 3-72 2.80 3- 58 4- 97 6.80 7-32 13.01 1.448. 15-47 16.05 15.04 13-05 9 04 6.12 4.68 4.66 5-54 6.85 8.31 11.23 ture gives to it. It will be understood that Latham's figures have reference to the temperature acquired in the service pipes the water passing through the main conduit or even through the large iron mains suffers much less change of temperature than Table X would indicate.§ Latham has patented an apparatus for tempering the water, which consists of a vertical tube driven or screwed into the ground to a depth of about 25 feet, the water being admitted at the top and withdrawn at the bottom, and special arrangements being adopted for the protection of the ascending pipe. With such an apparatus interposed in the service connection of the house, the range of temperature in ♦Quoted from Journal fur Gasbeleuchtung und Wasserversorgung, xxii (1879), P- 756- •(■Journal of Society of Arts, Sept. 17, 1880. \ The temperatures given in the reports of Dr. Frankland to the Registrar Gen- eral were taken in the company's mains at Deptford, near the source of the water. § This matter is discussed at length and mathematically by Perissini: Journ. fur Gasb. und Wasserv., xxiii (1880), pp. 608 and 644.