SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
Hughes's printing telegraph, historical artwork. This device was invented in 1855 by the British physicist David Edward Hughes (1831-1900). It was the first telegraph to print text at both the sending and receiving end. This meant that there was no longer a need for codes such as Morse code. The apparatus was powered by a weight (black, lower centre), although later models were powered by electricity. Illustration taken from Physique Populaire (1891), by E Desbeaux.
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