Figure 22.—Broadside published after commencement of work on the Thames Tunnel, 1827.
(MHT collections.) [Transcription] of the text is presented in the Transcriber's Notes below.
Figure 23.—Vertical section through Brunel's shield. The long lever, x, supported the wood centering for turning the masonry arches of the lining. (Law, A Memoir of the Thames Tunnel.)
Figure 24.—Thames Tunnel. Section through riverbed and tunnel following one of the break-throughs of the river. Inspection of the damage with a diving bell. (Beamish, A Memoir of the Life of Sir Marc Isambard Brunel.)