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Cross-section of Edisons lamp-black (carbon) button telephone transmitter (microphone), c1891. Wood engraving
The Electric Torchlight Procession in New York, USA, 1884. A torchlight parade in New York using Edison incandescent lamps fixed to the participants hats
First model of Edisons Phonograph c1877 (c1880). In this model the recording cylinder was rotated by hand. The message to be recorded was spoken into the mouthpiece at A