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Condenser, in wooden casing

1801-1850

Induction coil

1851-1900

Multiple battery

1920-1940

Voltmeter, metal face set in wooden casing

1916

Low-frequency electrotherapy machine

1850-1880

Fuse box

1870-1930

Vibrator, hand operated

1890-1920

Electrostatic machine

1801-1850

Stand of Oudin resonator constructed from instructions given by Dr. Riviere

1880-1930

X-ray tube stand(?), Europe, 1895-1910

1895-1910
Electric door bell from Tyler's shop, Kensington, 20th century

Electric door bell from Tyler's shop

1901-1950
Ducretet spark coil, wood and metal, with wooden retort stand by Rochfort of Paris, French, 1901-1930

Ducretet spark coil

1901-1930
Vacuum tube

Vacuum tube

1890-1920
Spark gap, wood casing, metal fittings, European, 1880-1910

Spark gap

1880-1910
Rheostat consisting of 22 separate resistors, European, 1870-1910

Rheostat consisting of 22 separate resistors

1870-1910
Induction coil, in case, metal, by Frederick Butt of London, 1880-1910

Induction coil

1880-1910
Induction coil, metal, on wood base, by Medical Supply Association of London, 167-185 Gray's Inn Road, London, England, 1880-1910.

Induction coil

1880-1910
Pair of bichromate cells, probably English, late 19th century

Pair of bichromate cells

1860-1900
White china switch and fuse box attached to rectangular wooden frame, part of Dr. Riviere' s experimental apparatus, French, 1880-1920

White china switch and fuse box attached to rectangular wooden frame

1880-1920
Tuning fork and electromagnet to show vibrations microscopically, possibly English, 1850-1900

Tuning fork and electromagnet to show vibrations microscopically

1851-1900
Electrotherapeutic machine, part only, large ring with wood sections catering metal, European, 1880-1910

Electrotherapeutic machine

1880-1910