20 agos 1793 anni - 1793 Commercial Semaphore System
Descrizione:
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.Aggiunto al nastro di tempo:
Data:
20 agos 1793 anni
Adesso
~ 230 years ago
