A itinerant medicine vendor demonstrating a deceptive illusion to an audience, he is pretending to burn a man's back and then use ointment to clear up the burns, in order to sell his wares. Etching.

Licence: Public Domain Mark

Credit: A itinerant medicine vendor demonstrating a deceptive illusion to an audience, he is pretending to burn a man's back and then use ointment to clear up the burns, in order to sell his wares. Etching. Wellcome Collection. Source: Wellcome Collection.