Electric telegraph | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-06-28

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Electrical_telegraph


00:00:40 1 History
00:00:48 1.1 Early work
00:05:09 1.2 First working systems
00:10:18 2 Commercial telegraphy
00:10:27 2.1 Cooke and Wheatstone system
00:12:59 2.2 Morse system
00:14:10 2.3 Expansion
00:14:52 2.4 Telegraphic improvements
00:18:24 2.4.1 Teleprinters
00:20:47 2.4.2 The harmonic telegraph
00:22:32 2.5 Oceanic telegraph cables
00:25:18 2.6 Cable and Wireless Company
00:25:53 3 Telegraphy in war
00:26:22 3.1 Crimean war
00:27:23 3.2 American Civil War
00:30:25 3.3 First World War
00:30:50 3.4 Second World War
00:31:50 4 End of the telegraph era
00:33:20 5 See also



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SUMMARY
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An electrical telegraph is a telegraph that uses coded electrical signals to convey information via dedicated electrical wiring. Electrical telegraphy dates from the early 1800s, and is distinct from the later electrical telephony, which uses the analogue magnitude of electrical signals to convey information.
The electrical telegraph, or more commonly just telegraph, superseded visual semaphore telegraph and was the first form of electrical telecommunication. 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.