An advert for a homeopathic product from a 1909 journal of the American Institute of Homeopathy.
Featured on PDR in the essay Proving it: The American Provers’ Union Documents Certain Ill Effects
What would induce physicians to ingest mercury to the point of vomiting and to painstakingly note down the effects of imbibing large amounts of cannabis tincture? Alicia Puglionesi explores the history of "proving", the practice of auto-experimentation which forms the cornerstone of homeopathic medicine.