Commemorative spade used to turn the first sod of the River Lee Conservancy's new cutting through Horse Shoe Point 1878
Cutting pick from Mitsubishi tunnel-boring machine. Used in Channel Tunnel works (French land service tunnel)
Sheave block, 3 pulley, used in construction of Telford's Menai Suspension bridge, 1826 Sheave block 1826
Silver plated model of the Forth Railway Bridge, 1882-1890, scale 1:480, Parliamentary submission model, on mirror base in glazed on table stand Forth Railway Bridge, 1882. 1882
Model, scale 1:8, of George Stephenson's first railway bridge, the Gaunless Bridge at West Auckland, County Durham, England, 1824, unsigned, British, 1824-1896. The Gaunless Bridge is reputed to be the first iron railway bridge. Model of Gaunless Bridge 1824-1896
Photograph, 11.75" x 9.5", showing 25ft span single-truss unit-construction steel bridge Photograph, 11.75" x 9.5"
Four photographs, 11.75" x 9.5", showing the erection of 50 ft span double-truss unit-construction steel bridge Four photographs