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 / by Thomas Clark.

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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 / by Thomas Clark. Public Domain Mark. Source: Wellcome Collection.

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This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.