Vol. LXIVNo. 20. THE BROADWAY AND SEVENTH AVENUE CABLE ROAD. THE BROADWAY AND SEVENTH AVENUE RAILROAD—CLEARING OBSTRUCTIONS FROM THE LINES OF THE CONDUITS., scientific american, 1891-05-16

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Vol. LXIVNo. 20. THE BROADWAY AND SEVENTH AVENUE CABLE ROAD. THE BROADWAY AND SEVENTH AVENUE RAILROAD—CLEARING OBSTRUCTIONS FROM THE LINES OF THE CONDUITS., scientific american, 1891-05-16

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