Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . i*^s^. Cast-iron Bridges. IRON-BKIDGE. 1200 IROX-CLAD VESSEL. Iroii-bii(l},es arc of many forms : cast-iron arohus,lattiie, truss-ginlers, arclu-d beam, or arili and tiuss,tubular girtUr, tulnilar arch, suspension. Tliese of tliem considered under separate lieads. The first l)uilt in Enjjland was an areli of cast-iron sections, erected in 1779 ov
Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . i*^s^. Cast-iron Bridges. IRON-BKIDGE. 1200 IROX-CLAD VESSEL. Iroii-bii(l},es arc of many forms : cast-iron arohus,lattiie, truss-ginlers, arclu-d beam, or arili and tiuss,tubular girtUr, tulnilar arch, suspension. Tliese of tliem considered under separate lieads. The first l)uilt in Enjjland was an areli of cast-iron sections, erected in 1779 over the Severn, at Coal-brookiUde, Shropshire, England, by Abraham Darbyand John It liad five , each cast intwo secured where they join at the crown ofthe arch by a cast-iron key-plnte, and eonneited to-gether horizontally and vertically by cast-iron bra(!es,formed with dovetails and tor<docks. The ribs arecovered with cast-iron plates, and the railing to thesides was of iron. Dimensions of some of the principal Cast-iron Bridges. Date. 1779 Coalbrookdale1795 BuiUlwiia .1791) .Sunderhmd .1818 Soutlnvurkt1836 Carrousel1859 .1854 St Petersburg New Blaekfriai-s Georgetown Aqueduct || River. c S
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