Changes

| 1774 || Early telegraph invented || Georges-Louis Le Sage || One wire each for 26 letters, ran between two rooms in same house <ref name="semaphore">{{cite web |url=https://www.sciencesource.com/p/16844756/Le-Sage-Early-Electric-Telegraph-9N3574.html |accessdate=December 30, 2017}}</ref>

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