Electromagnetic telegraph | Wikipedia audio article
Channel: wikipedia tts
Date: 16/01/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Electrical_telegraph


00:00:46 1 History
00:00:56 1.1 Early work
00:06:56 1.2 First working systems
00:14:26 2 Commercial telegraphy
00:14:36 2.1 Cooke and Wheatstone system
00:16:19 2.2 Morse system
00:17:59 2.3 Expansion
00:18:58 2.4 Telegraphic improvements
00:24:08 2.4.1 Teleprinters
00:27:35 2.4.2 The harmonic telegraph
00:30:05 2.5 Oceanic telegraph cables
00:34:06 2.6 Cable and Wireless Company
00:34:58 3 Telegraphy in war
00:40:23 4 End of the telegraph era
00:42:36 5 See also



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SUMMARY
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An electrical telegraph is a telegraph that uses electrical signals, usually conveyed via dedicated telecommunication circuit or radio.
The electrical telegraph, or more commonly just telegraph, superseded optical semaphore telegraph systems, thus becoming the first form of electrical telecommunications. In a matter of decades after their creation in the 1830s, electrical telegraph networks permitted people and commerce to transmit messages across both continents and oceans almost instantly, with widespread social and economic impacts.