In Thomas Alva Edison’s update on “The Perfected Phonograph” (1888), he reported that, instead of foil sheets, “wax cylinders can be sent through the mail in little boxes which I have prepared for that purpose, and then put upon another phonograph at a distant point, to be listened to by a friend or business correspondent” (647).
Edison, Thomas Alva. “The Perfected Phonograph.” The North American Review 146 (1888): 641-650. JSTOR. Web. 8 Nov. 2019.
Image: Illustration from “Patent Application, Thomas Alva Edison, April 17th, 1890.” _Edison Papers Digital Edition_. Web. 7 Nov. 2019.
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