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Not ancient, but optical telegraph systems were a thing. > The most widely used system was invented in 1792 in France by Claude Chappe, and was popular in the
by theandrewbailey 4y ago
Not ancient, but optical telegraph systems were a thing.
> The most widely used system was invented in 1792 in France by Claude Chappe, and was popular in the late eighteenth to early nineteenth centuries.
https://en.wikipedia.org/wiki/Optical_telegraph https://en.wikipedia.org/wiki/Optical_telegraph