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20 авг 1793 г. - 1793 Commercial Semaphore System

Описание:

Chappe brothers established the first commercial semaphore system between two locations near Paris. Napoleon used it a lot. Semaphore signaling spread to Italy, Germany and Russia. Thousands of men were employed manning the stations. The last operational semaphore system went out of business in 1860, Algeria.

Добавлено на ленту времени:

Telecommunications: A History

ByPaul Duran Jimenez
20 окт 2017
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Дата:

20 авг 1793 г.
Сейчас
~ 232 г назад
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