Medical inquiries and observations : containing an account of the bilious and remitting and intermitting yellow fever,as it appeared in Philadelphia in the year 1794 ; together with an inquiry into the proximate cause of fever ; and a defence of blood-letting as a remedy for certain diseases / by Benjamin Rush, M.D. professor of the institutes, and of clinical medicine, in the University of Pennsylvania ; volume IV.

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Credit: Medical inquiries and observations : containing an account of the bilious and remitting and intermitting yellow fever,as it appeared in Philadelphia in the year 1794 ; together with an inquiry into the proximate cause of fever ; and a defence of blood-letting as a remedy for certain diseases / by Benjamin Rush, M.D. professor of the institutes, and of clinical medicine, in the University of Pennsylvania ; volume IV. Source: Wellcome Collection.