. Bulletin. Science. Figure i8.—Wheatstone and Cooke's 5-needle telegraph receiver {top) and transmitter of 1837. Two keys on the transmitter had to be depressed to select a given letter. From R. Sabine, The History and Progress of the Electric Telegraph, London, 1872, pp. 44-45. 290 BULLETIN 228: CONTRIBUTIONS FROM THE MUSEUM OF HISTORY AND TECHNOLOGY. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution
. Bulletin. Science. Figure i8.—Wheatstone and Cooke's 5-needle telegraph receiver {top) and transmitter of 1837. Two keys on the transmitter had to be depressed to select a given letter. From R. Sabine, The History and Progress of the Electric Telegraph, London, 1872, pp. 44-45. 290 BULLETIN 228: CONTRIBUTIONS FROM THE MUSEUM OF HISTORY AND TECHNOLOGY. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution; United States. Dept. of the Interior; United States National Museum. Washington, Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off
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Keywords: ., bookauthorunitedstatesdepto, bookcentury1900, booksubjectscience
