Medical Mapping

"On the mode of propagation of cholera," Medical Times 24 (29 November 1851): 559-62. Part 2 appeared in MT 24 (13 December 1851): 610-12. Read at the London Epidemiological Society, 5 May and 3 June 1851. See part 2, p. 610, for Snow's discussion of a water-supply map from the 2nd Health of Towns Report (1845) and Grainger's map (1850) of cholera mortality in London during the 1848-49 epidemic.

Presentation: 4 December 1854. "Snow exhibits map and table depicting the previous cholera outbreak in Golden-square"
(Meeting of the Epidemiological Society.)

On the Mode of Communication of Cholera. London: Churchill, January 1855.
(January 1855 -- "Second Edition, much Enlarged." See p. viii, immediately after the ToC, for a description of the mortality map of the Golden Square outbreak (p. 45), and the map of the supply areas of the two South London Water Companies (p. 74).)

"Dr. Snow's Report," in Report on the Cholera Outbreak in the Parish of St. James, Westminster, during the Autumn of 1854. London: Churchill, July 1855.
(Snow dated his report, 12 December 1854. The Cholera Inquiry Committee asked him to read a paper, largely prepared in advance, that described his investigations of the Golden Square outbreak--significant expansions of what he discussed in MCC2, including a new feature to the map of deaths in the parish (see image p. 107).)