Optical Telegraphy - Semaphore: The first telegraph was invented by Claude Chappe - this non-electrical system was visual and used semaphore, a flag-based alphabet. The optical telegraph was replaced by the electric telegraph.
Claude Chappe - Optical Telegraph
By Mary Bellis, About.com
Claude Chappe - Optical Telegraph
The Chappe Telegraph SystemsClaude Chappe : 1763 - 1805Claude Chappe
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