k Breguet and Roosevelt Breguet and Roosevelts method of handing telephones. Suspending fork, F, is a key switch which puts the bell into the circuit. and Magnetism, London, 1891. Editorial Stock Photo - Afloimages
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Breguet and Roosevelt Breguet and Roosevelt s method of handing telephones. Suspending fork, F, is a key switch which puts the bell into the circuit. and Magnetism, London, 1891.
ED

Breguet and Roosevelt

Breguet and Roosevelt's method of handing telephones. Suspending fork, F, is a key switch which puts the bell into the circuit. and Magnetism, London, 1891.

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ID
143324594

Collection

License type
Editorial

Photographer

Creation date
01-09-2020

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