SUSPENSION UlUDUES. 195 



roadway, but rise in their course considerably above it; and from them 

 the transverse beams, which support the platform of the bridge, are 

 suspended by malleable iron rods. In the present instance, the supending 

 arch is 152 feet wide, spanning over the river Aire, and the towing or 

 hauling path ; and there is, besides, a small land arch of stone on each 

 side. The footpaths are on the outside of the two suspending arcs, and 

 the carriage-way passes between them. Each of the suspending arcs is 

 in six parts, and rowelled together, and the ends fit into cups cast xipon 

 the springing or foundation plates, forming a ball and socket-joint. The 

 cast iron transverse beams, which support the roadway, are suspended at 

 about every five feet. The roadway is of timber, with iron guard plateg 

 on each side, and upon the top of the planking are also hard malleable 

 iron bars, ranging longitudinally for the wheel racks, and transversely 

 for the horse tracks. The total length of the bridge is (including 88 feet 

 for two abutments) 240 feet; width of roadway, 24 feet; pathways 

 7 feet each. The foundations of the bridge rest upon bearing piles, and 

 the total expense was 4,200. 



THE MONK BRIDGE, NEAR LEEDS. 



This bridge, which is upon the same principle as the former, was 

 built in 1827, by the same engineer, Mr. Leather. Besides the suspension 

 arch, which spans over the river Aire, there are two small land arches, 

 and a 24 feet elliptical arch, over the Leeds and Liverpool canal; which, 

 at this point, is only about 50 feet from the river; this bridge is 



feet. 

 Length. ...... 260 



Span of Suspension Arch . . . .112 



Width. ...... 36 



Height, from the surface of the river to the spring i - 

 of the suspending arcs . . . . 



Such are the most celebrated suspension bridges in this country (there 

 are some others in the North of England and in Scotland, which we have 

 not space to particularise), and it only remains to describe the principles 

 upon which they are constructed. And this has been so pithily done in 

 the Encyclopaedia Americana, that we close our remarks by quoting it. 



