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Engineering drawings for a tunnel in cast iron

Year 1818
Object no. LDBRU:2017.18
Size 325 x 205mm
Location Stored at the London Metropolitan Archives
Acquired Auction at Bonhams
Grants from NHMF, Art Fund, V&A, Friends National Libraries & Trinity Buoy Wharf
Pen-and-ink engineering drawings for a tunnel in cast iron, dated "10 April 1818", and extensively annotated in French and English by Brunel, with notes on brickwork laid in cement and of the cast iron shell indicating thickness at the crown and sides; subscribed "The Cast Iron for a Tunnel of this nature will not exceed 200 Tons for every 100 feet run including the drain".
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