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Induction coil, European, 1870-1910

1870-1910

Rotatable coil of copper wire in frame by Griffin and Tatlock

1950-1970

Vertical induction coil with water regulator

1850

Induction coil for generating a.c.

1870-1910

Coil, European, 1850-1910

Coil, European

1850-1910

Induction coil, Stohrer type(?), vertical coil with ebonite cover-plate, trembler arrangement, with 2 cylindrical electrodes, made by John Weiss and Son, 62 Strand, London, England, 1875-1885.

Induction coil

1875-1885

Moving coil galvanometer, designed by D'Arsonval, modified from earlier models, wooden base supporting large magnet and moving coil, scale over magnet, pointer on coil, French, 1890-1910

Moving coil galvanometer

1890-1910

Induction coil in rectangular wooden box, with twin solenoid and trembler, wet cell, regulator switch and terminals, made by S. Maw Son and Sons, London, English, 1910-1920

Induction coil in rectangular wooden box

1910-1920

Tesla coil, probably from electrotherapeutic machine, European, 1850-1910

Tesla coil

1850-1910

Horizontal induction coil in broken rectangular wooden case, with 2 small cells, electromagnet trembler arrangement and terminals, English, 1855-1865

Horizontal induction coil in broken rectangular wooden case

1855-1865

High frequency resonator

High frequency resonator

1900-1920