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 Isambart Brunel in 1818. Woodcut, 1842

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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 Isambart Brunel in 1818. Woodcut, 1842

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Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 12, 1818., 1842, allowed, archival, archive, britain, brunel, civil, construction, digging, engineering, excavate, historical, history, invention, isambart, marc, men, patent, shield, simultaneously., thames, tunnel, tunnelling, woodcut