Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,522 pages of information and 233,953 images on early companies, their products and the people who designed and built them.
Francis C. Lowthorp (1810–1890) was a prominent US civil engineer and designer of iron truss bridges. Among his earliest designs was a railroad bridge across the Delaware River at Easton, Pennsylvania, connecting the Lehigh Valley Railroad with the New York Central Railroad and the Belvidere and Delaware RR.
He subsequently designed numerous other bridges, including some Pratt-truss type bridges using cast iron for compression and wrought iron for tension members (see entry for William Cowin).