https://www.neatorama.com/2008/02/11/10-fascinating-facts-about-edison/
10 Fascinating Facts About Edison - Neatorama
Edison with his phonograph (1877). To "hear" Edison bit into his phonograph so the sound vibration traveled through his teeth to his inner ear.You only have to...
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Articles about edison | Blaze Media
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The Cylinder Archive - All about Edison phonograph cylinder records
Dedicated to the hobby of collecting phonograph cylinder records featuring pictures sound guidelines and more.
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https://gutenberg.org/ebooks/subject/422
Books about Edison, Thomas A. (Thomas Alva), 1847-1931 - Project Gutenberg
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