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ballistic galvanometer with moving magnet

ballistic galvanometer with moving magnet

Nalder Brothers & Company
1900-1910
Campbell vibration galvanometer with moving coil

Campbell vibration galvanometer with moving coil

Cambridge Instrument Company, Ltd.
circa 1930
classroom demonstration galvanometer

classroom demonstration galvanometer

Heinrich Daniel Ruhmkorff
1850-1875
cosine galvanometer with moving magnet

cosine galvanometer with moving magnet

John Trowbridge
circa 1871
DC galvanometer

DC galvanometer

General Radio Company
circa 1925
demonstration galvanometer

demonstration galvanometer

Central Scientific Company
circa 1930
galvanometer

galvanometer

General Electric Company
circa 1940
galvanometer

galvanometer

J. &. A. Duboscq
circa 1880
galvanometer

galvanometer

Leeds & Northrup Company
circa 1929
galvanometer with moving magnet

galvanometer with moving magnet

American
1890-1920
portable galvanometer

portable galvanometer

Charles Chase
circa 1926
portable galvanometer with moving coil

portable galvanometer with moving coil

Leeds & Northrup Company
circa 1920
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The Collection of Historical Scientific Instruments
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p. 617-495-2779 • f. 617-496-5794
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