The new method of inoculating for the small-pox : delivered in a lecture in the University of Pennsylvania, on the 20th of February, 1781 / by Benjamin Rush, M.D. professor of the institutes and of clinical medicine in the University of Pennsylvania.

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The new method of inoculating for the small-pox : delivered in a lecture in the University of Pennsylvania, on the 20th of February, 1781 / by Benjamin Rush, M.D. professor of the institutes and of clinical medicine in the University of Pennsylvania. Public Domain Mark. Source: Wellcome Collection.

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