Sujet

Sectional view of a telegraph tower using Chappe's

Légende

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

Crédit

Photo12/Ann Ronan Picture Library

Notre référence

ARP07108_0460000672

Licence

Droits gérés

Format disponible

19.1Mo (1.3Mo) / 15.9cm x 30.0cm / 1882 x 3543 (300dpi)