LOCKPORT, N.Y., Dec. 6.--Division Superintendent Burrows, of the Central made the first crossing at 11.40 o'clock this morning on the cantilever bridge over the Niagara, on his pony Enrine No.

He looks at the different types of trestle bridges, arch bridges, cantilever bridges, cable suspension bridges, floating bridges and moveable bridges. Without listing every bridge, there's no true ...

Up to the 1700s, the bridge builders were limited by the length of arch that could be built ... major innovations - the use of steel and the cantilever principle. Three great piers were built ...