Telegraph | Invention, History, & Facts | Britannica
Sep 16, 2024 — Telegraph, any device or system that allows the transmission of information by coded signal over distance. The term most often refers to the electric telegraph, which was developed in the mid-19th century and for more than 100 years was the principal means of transmitting printed information.
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How the Telegraph Went From Semaphore to Communication Game Changer
Oct 11, 2013 — The Chappe semaphore telegraph consisted of a series of towers topped with three rotating arms or panels that could be moved into nearly 200 standard positions, each assigned a unique value or ...
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