The Telegraph Manual; A Complete History and Description of the Semaphoric, Electri and Magnetic Telegraphs of Europe, Asia, Africa, and America, Ancient and Modern

The Telegraph Manual; A Complete History and Description of the Semaphoric, Electri and Magnetic Telegraphs of Europe, Asia, Africa, and America, Ancient and Modern

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1859 edition. Excerpt: ...forbidding the receiving of messages by sound. Sinoe then the rule has been reversed, and the operator is required to receive by sound or he cannot get employment in first class stations. At the Cincinnati stations, for example, there is not a recording apparatus, and, of course, if an operator cannot read the language uttered by the mysterious messenger, as transmitted over the wires, he cannot have employment there. No mistakes are made, and, in fact, many experts have informed me that the ear proves to be more reliable than the mechanism. It is quite common for the operator to take with him, when he proceeds upon the line to repair it, a small pocket magnet, and when he arrives at the place of difficulty, to communicate back to his office. Some operators care not for even this small mechanism, preferring to manipulate by striking the wires together, and then receive with the tongue, by placing one wire above and the other wire below it. The voltaic pulsations will be felt on the tongue, and the dots and dashes are thus recognized as to time by the sense of feeling. In latter days practice has gone farther, and a second party has received intelligence from a distant office by noticing the quivering of the nerves of the tongue of another, who had the wires attached as above described. These latter modes of receiving, of course can never be used for practical telegraphing, but they are common in the repairing service, and have been for several years. EXECUTION OP AN INDIAN RESPITED BY TELEGRAPH. In 1850, a mail carrier, by the name of Colburn, was murdered on the plains some three hundred miles from the white settlements, on the Santa Fe trail. The mail bag was found near the dead body, open, and its contents scattered on the ground. Among the...show more

Product details

  • Paperback | 262 pages
  • 189 x 246 x 14mm | 472g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236547705
  • 9781236547705