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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 45 Times - Last Visitor from Beverly Hills, CA on 08/23/2014 at 2:05 PM
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