Shield used during digging of Thames Tunnel (1825-1843) which allowed 12 men to excavate simultaneously. Patent for this first tunnelling shield taken out by Marc Isambard Brunel in 1818. Woodcut,1842 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / UIG / Universal History Archive |
Taille de l’image : | 3954 px × 4500 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |