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Published online by Cambridge University Press: 15 September 2014
Koch, in his article on Disinfection and Antiseptics in the Mittheilungen aus dem K. Gesundheitsamte, vol. i., 1881, p. 264 (abstracted by Dr Whitelegge in the publications of the Kew Sydenham Society, vol. for 1886, “Microparasites in Disease”), gives the result of an elaborate series of experiments with mercuric chloride, and comes to the conclusion that a single application of a very dilute solution (1 to 1000, or even 1 to 5000) is sufficient to destroy the most resistant organism in a few minutes. He further states that, “with longer exposure, it only begins to be unreliable when diluted beyond 1 to 20,000.”
note * page 242 Since the above was read I have learned that some of these experiments have been repeated, and that Dr Dott has determined that in about a fortnight the tartaric acid converts the corrosive sublimate into the almost inert calomel. This is a point of great practical importance.