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La télégraphie historique Photos ❘ Science Photo Library

Channel tunnel
11903987 - Channel tunnel
Military semaphore,19th century
11904501 - Military semaphore,19th century
Dom Gauthey,French monk and inventor
11828869 - Dom Gauthey,French monk and inventor
Visual telegraph system,1791
11904486 - Visual telegraph system,1791
Smoke signalling
11904488 - Smoke signalling
Early telegraph message,1794
11904487 - Early telegraph message,1794
Optical telegraphy,19th century
11904502 - Optical telegraphy,19th century
Telegraph cable laying
11904492 - Telegraph cable laying
Semaphore station
11904483 - Semaphore station
Communication tower
11904489 - Communication tower
Guillaume Amontons,French physicist
11827147 - Guillaume Amontons,French physicist
Wheatstone telegraph system
11904495 - Wheatstone telegraph system
Optical communication
11904490 - Optical communication
Optical telegraphy,19th century
11904500 - Optical telegraphy,19th century
Telegraph machine
11904485 - Telegraph machine
Telegraph cable laying
11904491 - Telegraph cable laying
Baudot telegraph system
11904494 - Baudot telegraph system
Telegraph receiver
11904493 - Telegraph receiver
David E. Hughes,US inventor
11829195 - David E. Hughes,US inventor
Pneumatic tubes,19th century
11904499 - Pneumatic tubes,19th century
Early field telephone
11904573 - Early field telephone
Telegraph cable laying
11904484 - Telegraph cable laying
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