Galton Bridge, 1838.
© Science Museum / Science & Society Picture Library
Diagram of the cast iron bridge over the Birmingham Canal at Smethwick in the West Midlands, built in 1829. The bridge was designed by Thomas Telford (1757-1834) and named after Samuel Tertius Galton, member of the Board of Directors of the Birmingham Canal Company. The bridge's single span of 151 feet was a world record at the time, and it is a grade 1 listed building. Illustration from Telford's 'Atlas to the Life of Thomas Telford, civil engineer', published in London in 1838.