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IEEE Global History Network > Categories > Optical telegraphy
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Category:Optical telegraphy

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A replica of the controls on a Prussian Optical Telegraph - Image by Super Bass
A replica of the controls on a Prussian Optical Telegraph - Image by Super Bass

A system of conveying information by visual signals, usually using towers with flags or shutters

Pages in category "Optical telegraphy"

This category contains only the following page.

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Media in category "Optical telegraphy"

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