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aug 20, 1829 - 1830 First telegraph.

Description:

Joseph Henry constructs the first telegraph by sending electronic currents accross over a mile of wire, subsequenty activating an electromagnet, causing a bell to ring

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Telecommunications: A History

ByPaul Duran Jimenez
20 Oct 2017
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Date:

aug 20, 1829
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~ 196 years ago
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