On water, with considerations upon the supply of water to the inhabitants of the metropolis : recommending all those who value their health to endeavour to obtain a supply of the pure soft spring water which abounds ... under the blue clay of all the county of Middlesex and adjacent counties, known by geologists as the London Basin ... ; containing also a list of the pure soft spring water wells already in use.

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On water, with considerations upon the supply of water to the inhabitants of the metropolis : recommending all those who value their health to endeavour to obtain a supply of the pure soft spring water which abounds ... under the blue clay of all the county of Middlesex and adjacent counties, known by geologists as the London Basin ... ; containing also a list of the pure soft spring water wells already in use. Public Domain Mark. Source: Wellcome Collection.