37.1 MB (7.4 MB compressed)
4300 x 3017 pixels
36.3 x 25.7 cm ⏐ 14.3 x 10.1 in (300dpi)
SCIENCE SOURCE / SCIENCE PHOTO LIBRARY SCIENCE SOURCE / SCIENCE PHOTO LIBRARY
Morse's telegraph. Historical artwork of the receiver of a telegraph machine used to communicate in Morse code. The messages arrived at the receiver in wires as a series of long and short electrical pulses . Electromagnets attached to a printing head then converted these into dashes and dots respectively. In Morse code, each letter and number is represented by a combination of dots and dashes. The code was printed on a stream of ticker tape, which was collected at far left. Morse sent the first telegraph message in 1844. For an image of the transmitter, see image V400/068. This image has been colour-enhanced.
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