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Apps-Newton one inch induction coil by Newton & Co.

1898

Induction coil

1981

Electrotherapeutic induction coil, in case, c.1900

1900

Induction coil with electrodes for electrotherapy, England, 1900-1910

1900-1910

Induction coil, four terminals

Induction coil stimulator

1968

Du Bois-Reymond-type induction coil, London, England, 1920-1940

1920-1940

Sectioned induction coil

1874

Induction coil with interrupter made by J. Newman

1840-1857

Miniature induction coil

Induction Coil

1881

Medical induction coil

1910

Miniature induction coil, circa 1950

1950-1959

Induction coil

Induction coil

1870

Induction coil with integral spark-gap

1916

Du Bois-Reymond style sledge induction coil with extendable track and magnetic interrupter

1953

Induction coil, mounted, with trembler

Sledge type induction coil by C.F. Palmer Ltd.

Apps-Newton 10-inch induction coil, for X-ray work

1898

Sledge induction coil, Du Bois-Reymond type

Alfred Apps, London, 10-inch induction coil

1890

Medical induction coil

1925-1950

Induction coil with switch, simple hammer-break interrupter, discharging electrodes, and capacitor in base

Induction coil with switch

1900-1980

10" induction coil

10" induction coil

Induction coil described as an 'electric ozonizer' and possibly used for freshening the air in a large room. Not fitted with an interrupter. Part of the Riviere collection, but mistakenly lost its A-number when accessioned. This is similar but not identical to the large induction coil attached to the D'Arsonval Cage as depicted in photos in Riviere's scrapbook in the Wellcome Library.

Induction coil described as an 'electric ozonizer'

Induction coil by Griffin and Tatlock Ltd.

Induction coil by Griffin and Tatlock Ltd.

1926-1954

Induction coil, mounted on wooden base, 18" x 11", 10" high, coil mounted horizontally on top with switch gear and interrupter gear at one end, elec. no. 808.

Induction coil

Horizontal induction coil with interruptor, reversing switch and 1 ebonite pillar with terminal on top (another missing), all on wooden plinth made by Harvey and Peak, Beak Street, London, English, 1890-1900

Horizontal Induction Coil

1890-1900

Large induction coil with accessories.

Large induction coil with accessories.

1902

Large induction coil made by Alfred Apps, London, for William Spottiswoode, F.R.S., with two primary coils.

Large induction coil made by Alfred Apps

1876

Large induction coil by Alfred Apps, London, used by Sir William Crookes, with additional primary coil

Large induction coil by Alfred Apps

1879

Induction coil used by L. A.Woodward, possibly in conjunction with a Raman Spectrograph

Induction coil used by L. A.Woodward

Induction coil by Newton & Co., 3 Fleet Street, London, no.1380, c.1910

Induction coil by Newton & Co.

1901-1920

Large induction coil, by Ruhmkorff, of Paris

Large induction coil, by Ruhmkorff, of Paris

1851-1877

Induction coil, part of x-ray installation, by Cox-Cavendish Electrical Co., London, England, 1920-1925.

Induction coil

1920-1925

Induction coil for x-ray use, by A E Dean and Company Limited, London, England, 1903-1929.

Induction coil for x-ray use

1903-1929

Box, mahogany, containing induction coil by Gaiffe of Paris, about 1905

Induction Coil

circa 1905

13inch spark induction coil, on wooden plinth, with 'on/off' switch. Dated April 1907. Manufactured by Harold Fowler, Flixton

13 inch spark induction coil

1907