. The Encyclopaedia Britannica; ... A dictionary of arts, sciences and general literature. Fia. 182.—Fink Trass. water mark. Upon this are placed four octagonal columnsof cast-iron, 10 feet diameter, carried up to the level ofthe roadway, which is 100 feet above high-water mark. The Victoria Bridge- over the St Lawrence at Montrealis a tubular bridge of great length (7000 feet), chieflyremarkable for its ice breakers, shown in fig. 93. Fig. 132 shows some details of a Fink truss as used in ni-|rfil=f America. The mode of computing the stresses on thistruss has already been explained in § 59. A
. The Encyclopaedia Britannica; ... A dictionary of arts, sciences and general literature. Fia. 182.—Fink Trass. water mark. Upon this are placed four octagonal columnsof cast-iron, 10 feet diameter, carried up to the level ofthe roadway, which is 100 feet above high-water mark. The Victoria Bridge- over the St Lawrence at Montrealis a tubular bridge of great length (7000 feet), chieflyremarkable for its ice breakers, shown in fig. 93. Fig. 132 shows some details of a Fink truss as used in ni-|rfil=f America. The mode of computing the stresses on thistruss has already been explained in § 59. All the strutsare cast-iron tubes. Fig. 133 shows one of the wrought iron arches of a Collent*bridge over the Rhine at Coblentz. The bridge consistsof three spans of about 315 feet each. § 82. St Louis and Illinois Bridge.—The St Louis and St Lo\lJ^ Briugt. Fio. 133.—Arcli of JBridge at Coblentz. Illinois bridge over the Mississippi (fig. 5, Plate XVIII.) isthe finest example of a metal arch yet erected. It isdescribed as follows by Sir Charles A. Hartley, who visitedit in 1873 :— The Mississippi at St Louis is confined to a single channel1800 feet wide and 8 feet deep at extreme low water by an embank-ment or levee on the Illinois side, which is carried up to the levelof extreme high water, at which time the width is augmented to2200 feet. Both shores are revetted below the low water, some withrubble stones, and protected by the wharf pavements above that extreme range between high end low water is 41 feet. Owingto the narrow gorge through which the whole volvune of the Mis-•issippi flows the variations in the bed of the river are yery James B. Eadg, M. Imt. , the distinguished engineer who designed the bridge and superintended its constraction,infonnedthe author that a rise of 13 feet less than high-wa
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