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electromagnetic coil (solenoid)

electromagnetic coil (solenoid)

American
1890-1920
inductance coil

inductance coil

American
1900-1930
inductance coil

inductance coil

American
1900-1930
inductance coil

inductance coil

American
circa 1920
magnetic coil

magnetic coil

American
1870-1920
magnetic coil

magnetic coil

American
1920-1950
solenoid coil

solenoid coil

Philip Harris & Company, Ltd.
1900-1920
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The Collection of Historical Scientific Instruments
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