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Vertical spinning wind tunnel for testing models

Late C19 shocking coil electrotherapy apparatus with rheostat and milliammeter

1870-1940

Electronic toy, game

1996

Radar Guidance Head for British Skyflash Missile.

Battery-powered a.c. electrotherapy apparatus by X-Rays Ltd, c.1926, in wooden case, London, English, c.1926, apparatus used at New Cross Hospital, London until 1976.

Battery-powered electrotherapy apparatus

circa 1926