A new process for purifying the waters supplied to the Metropolis by the existing Water Companies: rendering each water much softer, preventing a fur on boiling, separating vegetating and colouring matter, destroying numerous water-insects, and withdrawing from solution large quantities of solid matter, not separable by mere filtration / [Thomas Clark].

  • Thomas Clark
Date:
1841
Catalogue details

Licence: Public Domain Mark

Credit: A new process for purifying the waters supplied to the Metropolis by the existing Water Companies: rendering each water much softer, preventing a fur on boiling, separating vegetating and colouring matter, destroying numerous water-insects, and withdrawing from solution large quantities of solid matter, not separable by mere filtration / [Thomas Clark]. Source: Wellcome Collection.

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    GENERAL OBSERVATIONS. same water as was supplied to the patients for drink. On the day before, the cistern, it was said, had been further drawn off than usual, and a larger supply of water had in consequence been received on the same day. Thus far, the occurrence of so many insects was accidental; but, with a good eye, it is not difficult to discover the creatures alluded to in the water as it flows from any of the pipes. In the patented process, the lime-water exists long enough, as lime- water, to destroy the insects. At least if any escape, it must be of some rare and particularly hardy kind. GENERAL OBSERVATIONS. L Quantity of Water supplied to the Metropolis. In the several estimates that follow, the quantity of water at present required daily for the use of the inhabitants of the metropolis is assumed at six millions of cubical feet, that is, thirty-seven and a half millions of imperial gallons. We may form some idea of this bulk, if we conceive the supply of one day to be contained in a reservoir of a square form, each side being two hundred feet. Lhe depth of the water would be one hundred and filty feet. The quantity in de¬ mand is every year increasing. II. Large Quantity of Solid Matter withdrawn from solu¬ tion by the New Process. The weight of chalk separated by the patented process from the whole waters of the several Companies would be about TWENTY-FOUR TONS A DAY, Or EIGHT THOUSAND TONS a vear. Heie the weight stated refers to matter such as no filter can separate, and it does not include any of the chalk that has foi its basis the lime added to the water in the form of lime-water. Taking both together, the chalk
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