✍ Scribed by G. Whitefield Chance
No coin nor oath required. For personal study only.
The South Street Bridge, crossing the Schuylkill at Philadelphia, is one of the few bridges in this country erected on large cylindrical iron columns, filled with masonry, as piers. Two other bridges with such piers are well known, viz., that across the Harlem River, and the great Atchafalaya Bridge, on the Texas and Pacific Railway, built by Major Anderson.
It is very doubtful whether this method of obtaining supports for trusses possesses any material advantage over the ordinary caisson and masonry pier method ; while for arch abutments, where the horizontal thrust comes into play so powerfully, this style of pier, as at present built, is of course not advisable.
The bridge, which it is our purpose to describe, was built between the years 1872 and 1876 under a commission authorized by an act of the State Legislature. It was erected in opposition to the wishes of City Councils, who filed a protest against the action of the Legislature.
Moses A. Dropsie and ex-Judge Findlay were the successive Presidents of the Bridge Commission. A contract to build the structure was made by the Commission with John W. Murphy, C. E.,
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