English, c. 1880, signed on a plaque to the base 'F. J. Cox, 26 Ludgate Hill, London', standing on a French polished circular base with lacquered brass terminals and supports, adjustable support at the rear with silvered copper reflector, electromagnetic release at the top to lower the carbon electrode (missing), opposing electrode support at the base with electrical terminal, height 44cm, base diameter 16.5cm.