The Works Of Messrs. Schneider And Co.

150 MESSRS. SCHNEIDER AND CO.’S WORKS. 400 metres (1,640 ft. and 1,312 ft.). The foundations were to be executed with the help of compressée! air, notwithstanding the great depths. (M. Hersent has are two on each masonry pier, and their head has the shape of an ogival truncated dôme, on which the girder rests. The Pfund System of Military Bridges. described fully the means lie intended taking in order to overcome the difficulties of this part of the work.) The superstructure rests on iron pillars, which are erected over masonry piers ; the iron pillars are tubular ; there The minimum lieight from low-water mark to the bottom part of the girders is 61 metres (200 ft.); the rail level is 70.450 metres (231 ft.) above low-water mark. The large spans of 500 metres (1,640 ft.) consist of two