An excited physician examining a urine specimen and referring to a book, while the patient waits for the diagnosis, two assistants are mixing concoctions in the background. Mezzotint by J.B. Enzensberger after D. Teniers, the younger.

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An excited physician examining a urine specimen and referring to a book, while the patient waits for the diagnosis, two assistants are mixing concoctions in the background. Mezzotint by J.B. Enzensberger after D. Teniers, the younger. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.