Workmen fitting the metal casings for an underground tunnel. Wood engraving, 1868.

Date:
1868
Reference:
36588i
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Description

This is the "Greathead Shield" devised by the engineer of that name for driving large tunnels through clay soil

Publication/Creation

[Place of publication not identified] : [publisher not identified]

Physical description

1 print : wood engraving ; image 12.5 x 11.4 cm

Lettering

Advancing the shield. Further lettering in pencil reads: Tower Subway 1868

Reference

Wellcome Collection 36588i

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