. Bulletin. Science. Figure 35.—Morse system equipment of the 1850's. a. Key; h, register, c, relay; d, e, two types of sounders. From G. B. Prescott, History, Theory, and Practice oj the Electric Tele- graph, Boston, i860, pp. 75, 78, 80, 91, 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
. Bulletin. Science. Figure 35.—Morse system equipment of the 1850's. a. Key; h, register, c, relay; d, e, two types of sounders. From G. B. Prescott, History, Theory, and Practice oj the Electric Tele- graph, Boston, i860, pp. 75, 78, 80, 91, 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
