Phonoplex telegraph invented by Thomas Alva Edison (1847-193
Phonoplex telegraph invented by Thomas Alva Edison (1847-1931). Engraving
Picture No
11021374
Media ID
48550193
Size
7062px x 2773px
(8.9MB)
Credit
© Thaliastock / Mary Evans
Source
Thaliastock
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Alva Edison Invent Message Telecommunication Telecommunications Telegraphic Telegraphy
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