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1 jan 1794 ano - The Semaphore System

Descrição:

In 1794, a french man named Claude Chappe developed a system called Semaphore in which a wooden arm would sit on top of high towers and convey different messages depending on the position it is in. Messages were read by telescopic readings from 5 to 10 miles away.

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ByMolina
7 nov 2019
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Data:

1 jan 1794 ano
Agora
~ 231 years ago

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