. Bulletin. Science. L o jv n o jv Figure 26.—Bain's electrochemical telegraph as used with punched paper tape. From L. Turnbull, The Electro-Magnetic Telegraph, Philadelphia, 1853, p. 38. Figure 25.—Wheatstone's ABC telegraph, an instrument made in 1876 and based upon the patent of i860. From E. Feyerabend, Der Telegraph von Gauss und Weber, Berlin, 1933, P- 79- that of making the register work not only in the labora- tory but over a distance. When Morse showed his instrument to his colleague, Leonard Gale, professor of chemistry at New York University in January 1836, it would not work throu
. Bulletin. Science. L o jv n o jv Figure 26.—Bain's electrochemical telegraph as used with punched paper tape. From L. Turnbull, The Electro-Magnetic Telegraph, Philadelphia, 1853, p. 38. Figure 25.—Wheatstone's ABC telegraph, an instrument made in 1876 and based upon the patent of i860. From E. Feyerabend, Der Telegraph von Gauss und Weber, Berlin, 1933, P- 79- that of making the register work not only in the labora- tory but over a distance. When Morse showed his instrument to his colleague, Leonard Gale, professor of chemistry at New York University in January 1836, it would not work through 40 feet of wire. In a letter dated March 10, 1837, Levi Woodbury, Secretary of the Treasury, requested that proposals for a telegraph be submitted to the Government. Secretary Woodbury was of course thinking of the semaphore telegraph. When Morse heard of this letter, it stimulated him to do more intensive work on his own invention for fear of losing the Federal priority to others. Sometime during the same spring, Morse confided to Gale that if he could work his telegraph through 10 miles of wire, he could work it around the world. For Morse had conceived that a relay (fig. 31) could. Figure 27.—American form of Bain's electro- chemical receiver. From G. B. Prescott, History, Theory, and Practice of the Electric Telegraph, Boston, i860, p. 129. 296 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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