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 . 65 5 / ^ lEON-CLAD VESSEL. 1201 IROX-CLAD Wrougkt-Iron Bridges. angle of about 30°, and plated with 2 to i inches ofiron, backed with 3 feet of oak. Tliey carried 4 to16 guns, and some of them were made to float in 2ifeet of water. They were calculated to fight bowon, and were practically invulnei-able to 100-poundshot when in this position. The Benton,
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 . 65 5 / ^ lEON-CLAD VESSEL. 1201 IROX-CLAD Wrougkt-Iron Bridges. angle of about 30°, and plated with 2 to i inches ofiron, backed with 3 feet of oak. Tliey carried 4 to16 guns, and some of them were made to float in 2ifeet of water. They were calculated to fight bowon, and were practically invulnei-able to 100-poundshot when in this position. The Benton, Ex-sex, Carondelet, Lexington, and a largenumber of others, were of this construction. Towardthe lattiu part of the war a number of monitors werebuilt for service on the Mississipfii. A class of vessels plated with J-inch iron werejocularly called tin-clads. Their armor was a pro-tection against riile-balls, but was easily penetratedby shells IVoni the lightest field-pieces. Improvised iron-clads, consisting of river steamersplated with railroad-iron, were used by both partieson the Mississippi. They were simjd} makeshifts,but iu some cases were founil to be rpute forniidabje. The Galena was one of thi first three sea-goingiron-clads built for the United States government,the
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