Early electric telegraph machine. 1868 illustration of an early telegraph machine that used two magnetic needles (top). Swiss physicist Georges-Louis

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Early electric telegraph machine. 1868 illustration of an early telegraph machine that used two magnetic needles (top). Swiss physicist Georges-Louis Le Sage invented the first telegraph machine in 1774. However, although his system worked, it was impractical and not adopted. Practical electric telegraphy was invented in 1837.

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Size: 2664px × 3626px
Photo credit: © COLLECTION ABECASIS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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