Edison's Phonometer
by Universal History Archive/uig
Title
Edison's Phonometer
Artist
Universal History Archive/uig
Medium
Photograph - Photograph
Description
Edison's phonometer which used the energy generated by speech to drive a flywheel. He claimed the power could be used to drill a hole in a wooden wall. From ''La Nature'', Paris, 1878.
Uploaded
July 31st, 2016
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