Thomas Edison's To-Do List, 1888 – The Marginalian
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Edison's phonograph was developed as a result of Thomas Edison's work on two other inventions, the telegraph and the telephone. In 1877, Edison was working on a machine that would transcribe telegraphic
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Origins of Sound Recording: Thomas Edison - Thomas Edison National Historical Park (U.S. National Park Service)
Inventor Thomas Edison in his laboratory among work tools, from... ニュース写真 - Getty Images
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Edison's Talking Machine | National Museum of American History