An interesting medico-galvanic coil in very good condition. The intensity of the electric shock can be varied by pulling out the central rod running through the centre of the coil.
Ask the Dealer
Fletcher Wallis sells objects and books relating to the history of science, medicine and technology from his unit at Admiral Vernon Arcade Portobello Road. He publishes books through Vernier Press, including Antique Medicine Chests, and Corkscrew Patents from 1795. He has been dealing for thirty five years.