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01AETTXY
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Sectional view of a telegraph tower using Chappe's (1763-1805) semaphore system, showing the method of moving the signalling arms. From Louis Figuier Les Merveilles de la Science, Paris, c1870. Engraving

Credit
Universal Images Group / Universal History Archive

Dimensions
6000 x 11297 pixels

Print Size @ 300 dpi
20 x 38 inches / 51 x 96 cm

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Property No you may not need it
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