The Optical Telegraph
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Smoke signals, drum telegraphs, and the marathon runner? are all? all examples of man’s effort? to conquer the tyranny of distance. However, the first truly successful solution to the problem of rapidly transmitting language across space was the Frenchman Claude Chappe’s optical telegraph. His? chain? of stone towers, topped by 10-ft. poles and 14-ft. pivoting cross members and spaced as far apart as the eye could see,? was first demonstrated to the public in March of 1791 on the Champs Elysees. Chappe created a language of 9,999 words, each represented by a different position of the arms. When operated by well-trained optical telegraphers, the system was extraordinarily quick. Messages could be transmitted 150 miles in two minutes. Eventually the French military saw the value of Chappe’s invention, and lines of his towers were built out from Paris to Dunkirk and Strasbourg. Within a decade, a network of optical telegraph lines crisscrossed the nation. When Napoleon seized power in 1799, he used the optical telegraph to dispatch the message, “Paris is quiet and the good citizens are content.”
June 15th, 2006 at 1:48 pm
And what happened? When were they taken down? (When did electric telegraph get to France?) Are any of the towers still there and operational?
June 15th, 2006 at 1:53 pm
Well, one answer from the web -
lasted until 1853, when electric telegraph arrived and replaced.
May 11th, 2007 at 2:00 pm
It would appear that Terry Pratchett’s semaphore towers from his Discworld novels have a fairly exact real-life counterpart, then. I am deeply amused.