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Phonograph work - PowerPoint PPT Presentation

The Phonograph

The Phonograph. It all started in 1877. Thomas Edison was working on the invention of the telegraph and telephone Discovered that the telephone message could be recorded. Gave a sketch of the machine to his mechanic, who built it in 30 hours. It all started in 1877. “ Mary Had a little lamb”

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Phonograph work - PowerPoint PPT Presentation

The Phonograph