. Appleton's dictionary of machines, mechanics, engine-work, and engineering. any number of compositors may be used to prepare the messages which the capacity of the \\ ire illenable it to transmit. Thus far, its use has proved that one well insulated wire will transmit, per dayof 12 hours, 10,800 messages of ten words each. To do this with any system depending upon themanipulation or touch of the finger direct, would require the use of :it least ten wires and twenty in-struments. With the rapid oxtension and future development of the telegraph, this improvement fur-nishes tho means of reducin
. Appleton's dictionary of machines, mechanics, engine-work, and engineering. any number of compositors may be used to prepare the messages which the capacity of the \\ ire illenable it to transmit. Thus far, its use has proved that one well insulated wire will transmit, per dayof 12 hours, 10,800 messages of ten words each. To do this with any system depending upon themanipulation or touch of the finger direct, would require the use of :it least ten wires and twenty in-struments. With the rapid oxtension and future development of the telegraph, this improvement fur-nishes tho means of reducing the tariff for telegraphing to a point low enough to bring it within themeans of every human being possessing Sufficient intelligence to commit his thoughts to writing. It canbe used as an auxiliary t> the magnetic telegraph, and is readily changed to any system oi telegraphicalphabet. Its usefulness however is greatly enhanced in connection with the eleotro-chemioo] instru-ment, which records its signs by the simple pulsations of the elertiic current. 698 Houses Printing Telegraph. This beau-tiful invention may be considered as one ofthe wonders of the age. Using but a singlewire, it is yet able to select and print inorder the letters of the common alphabet,with a greater rapidity than the hierogly-phic marks of Professor Morse, representingthe same letters can be produced. This instrument is complicated, thoughall its parts are simple. We shall try to de-scribe it so that the mode of its operationmay be understood. A perspective view ofthe instrument is shown in Fig. 3398, com-prising hoth the transmitting and receivingapparatus. The principle hy which the dif-ferent letters are signalized over the wire, isthe transmission of a given number of elec-trical impulses for each letter, by the rapid,opening and closing of the circuit. This isaccomplished by means of the twenty-sisletter-keys, and the two keys for the dot anddash, seen in the figure. Under the key-b
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
