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A Hand Cranked Device Onsisting
Photograph - Photograph
A hand cranked device onsisting of coiled metal wire and a magnet, demonstrate the principle elements of 19th and 20th century electrical generators, also called dynamos. Illustration from DYNAMO-ELECTRICITY, 1884 by George B. Prescott.
December 6th, 2011
Viewed 47 Times - Last Visitor from New York, NY on 09/26/2014 at 11:24 PM
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