On December 7, 1877 Thomas Edison demonstrated his phonograph at the New York City offices of the nation's leading technical weekly publication, Scientific American. The following report set off ...

He developed many innovations in the fields of electric power generation, mass communication, sound recording, and motion pictures ... and recorded by a phonograph. Edison wrote plans and theories ...

The two American innovators – Thomas Edison, the inventor of both the electric light bulb and the phonograph, and Henry Ford, pioneer of the automobile – were good friends who built their ...