The Tranquilizing Chair of Dr. Benjamin Rush
Benjamin Rush believed that mental diseases were caused by irritation of the blood vessels in the brain. His treatment methods included bleeding, purging, hot and cold baths, and mercury, and he invented a tranquilizer chair and a gyrator for psychiatric patients. He published many medical papers and gave medical lectures to physicians and students.
Wood engraving, “Observations on the Tranquillizer” in The Philadelphia Medical Museum, 1881.