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#OTD 1791 Long-distance communication speeds up with the unveiling of a semaphore machine in Paris
“si vous reussissez, vous serez bientôt couvert de gloire”
“si vous reussissez, vous serez bientôt couvert de gloire”
The Optical Telegraph: Faster than a Messenger on Horseback : History of Information
The Optical Telegraph: Faster than a Messenger on Horseback