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.

Licence: Public Domain Mark

Credit: 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. Source: Wellcome Collection.