Sujet
Communicating by speaking tube, 1882. Artist: Unknown
Légende
Speaking tube, 1882. A cross-section of a ship, showing how communication between the bridge (top) and the rest of the vessel took place. Before the invention of the telephone this device was used for communication between different levels in houses, warehouses and ships. From Physics in Pictures by Theodore Eckardt. (London, 1882).
Oxford Science Archive
Date
1882
Crédit
Photo12/Heritage Images
Notre référence
HRM19B64_228
Model release
Non
Licence
Droits gérés
Format disponible
49,9Mo (1,7Mo) / 28,4cm x 44,0cm / 3358 x 5197 (300dpi)