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demonstration galvanometer with moving magnet

demonstration galvanometer with moving magnet

L. E. Knott Apparatus Company
1900-1920
galvanometer

galvanometer

L. E. Knott Apparatus Company
circa 1910
galvanometer with moving coil

galvanometer with moving coil

L. E. Knott Apparatus Company
1910-1930
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The Collection of Historical Scientific Instruments
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