ght abutments to the piers, east and west, the arches have a example of engineering. We have also given various illus- in barges underneath the place where the men are working, trations thereof, and of the superstructure. We now pre- span of 502 feet; the central arch from pier to pier has a and… … Dions manner in which the placing of the superstructure is bridge being double, the arches are double, but the principle ice was used. The workmen now thoroughly understand the handling of being executed. This work is now proceeding at St. Louis, can be more easily shown with one part; for as it is…
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