. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . at to do in emergencies, is one of thefeatures of the work. The book con-tains numerous tables and engineering(lata, and is about 45^x6H ins. It has,with index, 630 pages, and is well illus-trated. The book is bound in a flexibleleather cover. The .Argentine Congress has author-ized the construction of 2,500 miles ofrailway, and it is said that French andBelgian capitalists have offered to sup-ply the necessary funds. April, 1906. RAILWAY AND LOCOMOTIVE HNGIN-KERING 161 Black River Bridge, N.
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . at to do in emergencies, is one of thefeatures of the work. The book con-tains numerous tables and engineering(lata, and is about 45^x6H ins. It has,with index, 630 pages, and is well illus-trated. The book is bound in a flexibleleather cover. The .Argentine Congress has author-ized the construction of 2,500 miles ofrailway, and it is said that French andBelgian capitalists have offered to sup-ply the necessary funds. April, 1906. RAILWAY AND LOCOMOTIVE HNGIN-KERING 161 Black River Bridge, N. Y., C. & St. L. Tlic bridge over the Rlack river atLorain, Ohio, on the New York, Chica-go & St. Louis Railroad, commonlycalled the Nickel Plate, is for a singletrack, and consists of a swing span andone fio ft. plate girder span. Our illus- and followed by a train of 4,000 lbs. perfoot. The swing span is operated bytwo 30 electric motors. The prin-cipal members of the bridge are com-posed of medium steel having an ulti-mate tensile strength of from to70,000 lbs. per sq. RIVKK SWING URIUGE; trations show a passenger train cross-ing the river on this structure. We have called the movable part ofthe bridge a swing span instead of say-ing draw bridge, for the reason thatthe span, as its name implies, swingsabout a center and when open standsat right angles to the railway line andparallel to the stream. A draw bridge,strictly speaking, is a bridge which ishinged at one end and can be pulled upinto a vertical position. The typicaldraw bridge of old days was used tospan the moat about a castle and whenpulled up practically made the strong-hold into an island. The modern ap-plication of the draw bridge idea is tobe found in the roller lift or basculebridges, which are used on a good manyof our railways. The swing span of this bridge is athrough girder, which means that thetrusses are above the bridge floor andthe train runs through between approach
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
