'Ultratherm' electrotherapeutic machine, probably for short-wave diathermy, with four groups of two electrodes, by General Radiological, British, 1946. Sheet metal cabinet on casters with pyramid-shaped lid, with electrode rod attachments on one side of cabinet. 'Ultratherm' electrotherapeutic machine 1946
Electrostatic machine, wood box, metal fittings, in case, Wimshurst machine Electrostatic machine 1901-1930