Telegraph machine designed by Samuel Morse. Illustration c. 1889. Morse (1791-1872) was an American contributor to the invention of a single-wire telegraph system based on European telegraphs and co-inventor of the Morse code. In 1844 the first telegraph line, about 65km long, was completed linking Washington to Baltimore. The first message sent by Morse was What hath God wrought; it was sent in a code of dots and dashes, the Morse code, which he had devised in 1838. There is an argument amongst historians that Morse may have received the idea of a plausible telegraph from Harrison Gray Dyar and he never acknowledged the help received by the American physicist J. Henry. | |
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Credit: | Science Photo Library / Science Source |
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