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Electric telegraphy in Germany. 19th-century diagram of connections between German cities using the electric telegraph developed in the 1840s by US inventor Samuel Morse (1791-1872). From left: Berlin, Braunschweig (Brunswick), and Minden. This artwork is from 'Der Elektromagnetische Telegraph in den einzelnen Stadien seiner Entwicklung' (The Electromagnetic Telegraph in the Various Stages of its Development, 1850) by German author Heinrich Schellen (1818-1884). (KEYSTONE/SCIENCE PHOTO LIBRARY/KING'S COLLEGE LONDON/SCIENCE PHOTO LIBRARY)