A RARE WOODEN-CASED ELECTROTHERAPY OR DIATHERMY MACHINEVICTOR ELECTRIC COMPANY, CHICAGO, CIRCA 1900 The rectangular pedestal-form cabinet containing induction coils and related electrical infrastructure to interior, the exterior with central brass discharge sphere fitted with a cable-spool over moulded top incorporating connection posts labelled D'ARSONVAL and ULTRAVIOLET, the front applied with veined marble control panel fitted with shut-off lever, arch sector dial labelled FREQUENCY CHANGER and other various electrical levers, switches and adjustments, the right-hand side with applied trade label Victor, TRADE MARK, ELECTRIC CORP. CHICAGO, U.S.A., 3529 over recess containing clips holding various medical applicators, with panelled lower section, moulded skirt base and rolling on later castors.152.5cm (60ins) high, 48cm (19ins) wide, 53.5cm (21ins) deep.Victor electric Corporation was founded in 1893 by Charles Samms and Julius Wantz and began their business by supplying the dental industry. After the discovery of X-rays by Wilheim Roentgen in 1895 they branched-out into the production of medical X-ray equipment. Subsequent mergers and acquisitions by 1916 caused Victor Electric Corporation to become one of the global leaders in the production and supply of electrical medical and X-ray equipment. In 1920 they merged with General Electric and were renamed a Victor X-Ray Corporation and operated as an autonomous subsidiary but was eventually fully absorbed into GEC by 1930.The current lot utilises induction coils most likely configured in a manner devised by Oudin type induction coils in order to be able to deliver electrotherapy compatible with Jacques Arsene D'Arsonval's principles whose experiments utilising AC currents set at over 5,000Hz led to the development of diathermy as a treatment process.