Title

Sectional view of a telegraph tower using Chappe's

Caption

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, c.1870. Engraving

Credit line

Photo12/Ann Ronan Picture Library

Reference

ARP07108_0460000672

License type

Rights managed

Available size

19,1Mb (1,3Mb) / 6,3in x 11,8in / 1882 x 3543 (300dpi)