MAKE A MEME View Large Image NMAH DC - IMG 8861.JPG Carbon-resistance telephone transmitter 1878 patent model by Thomas Edison Exhibit in National Museum of American History Washington DC USA I took this photograph 2011-01-18 15 51 51 Daderot Public domain Electrical ...
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Keywords: NMAH DC - IMG 8861.JPG Carbon-resistance telephone transmitter 1878 patent model by Thomas Edison Exhibit in National Museum of American History Washington DC USA I took this photograph 2011-01-18 15 51 51 Daderot Public domain Electrical equipment in the National Museum of American History Thomas Alva Edison Early telephones Telephone microphones Patent models
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