akg077655
Technics / Telegraphy:. Five needle telegraph, invented 1837 by William Fothergill Cook and Charles Wheatstone. (First telegraph of the world used for railway; electromagnetic; words are telegraphed by the action of five magentic needles). © AKG / Erik Bohr. Berlin, Museum für Kommunikation. Museum: Berlin, Museum für Kommunikation.
DC