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- Douglas Coulter's collection of bridge maker's plates from wrought iron bridges of Illinois. Also features photographs of covered and iron bridges, and bridge postcards.
Building a Bridge
- The story of the rebuilding of a bridge over the Blyth between Heveningham and Ubbeston in 1794.
- Discover how China's Song dynasty during the eleventh and twelfth centuries used the high arch "rainbow bridge" to solve the problem of spanning a fast-moving river without impeding boat traffic. Nova online.
English versus American Bridges
- Discussion on the merits of English and American iron bridges. Published in the 1874 edition of the Railway Gazette.
Instructions on Modern American Bridge Building
- Full text of George Tower's illustrated book first published in 1874.
A Treatise on Bracing With its Application to Bridges and Other Structures of Wood or Iron
- Full text of Bow's 1874 publication.
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