1877
Accidental invention. As with many things in life, Edison stumbled on one of his great inventions while working on a way to record telephone communication at his laboratory in Menlo Park, New Jersey. Because of this, he was dubbed "Wizard of Menlo Park."
http://www.history.com/tdih.do?action=tdihArticleCategory&id=5537
http://memory.loc.gov/ammem/edhtml/edcyldr.html
Tuesday, November 21, 2006
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