"To the Editor [contingent contagion of cholera]"

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PDF from a photocopy, courtesy of the Taubman Medical Library, University of Michigan.

"In your Journal for Saturday, November 26, it is stated that "Dr. James Johnson now advocates contingent contagion." I request to know when I altered my opinions; for surely the above passage insinuates such a change. . . ."

Remainder of letter is not transcribed. Please view the PDF from the link above.