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""Cholera and the water supply." Supplement to the Weekly Return"

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(19 November 1853)In the annual compilation of Weekly Returns, the volume number is 14, the week is number 47, page numbers are 400-06.

This supplement, and the clarifying table in the next Weekly Return, caused Snow to realize that a potential natural experiment existed in those parts of South London served by both the Lambeth and Southward & Vauxhall water companies.

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