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Photograph

Pontoon Railway Bridge

Date: 1910
Description: Slightly elevated view of the pontoon bridge construction. People are standing on and near the railroad tracks in the foreground.
Photograph

Pile-Pontoon Bridge

Date: 1870
Description: Stereograph of John Lawler's pile-pontoon railway bridge over the Mississippi River. Three men are standing and sitting on the bridge in the foreground. Bu...

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