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Science History, Edison’s 1876 Loud-Speaking Telephone
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Science History, Edison’s 1876 Loud-Speaking Telep...

John Logie Baird, a Scottish inventor, demonstrated the first working television system, the 'Televisor', in 1926. This electromechanical device used a spinning Nipkow disk to scan images, converting ...
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John Logie Baird, a Scottish inventor, demonstrate...

Martin Luther King Jr., March on Washington (August 28, 1963)
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Martin Luther King Jr., March on Washington (Augus...