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1. Letter from the Secretary of War, in Response to Senate Resolution of April 12, 1892, relative to the proceedings of the board of officers convened to consider the construction of a bridge in Duluth.

2. Aerial Lift Bridge: Letter about bridge design, Duluth, Minnesota

3. Aerial Bridge: Design for Suspended Car Transfer Over Ship Canal, Duluth, Minnesota

4. Aerial Bridge: Details of Traveler Suspended Car Transfer Over Ship Canal, Duluth, Minnesota

5. Aerial Bridge: Detail of Car Suspended Car Transfer Over Ship Canal at Duluth, Minnesota

6. Aerial Bridge: Detail of Car Suspended Car Transfer Over Ship Canal, Duluth, Minnesota

7. Aerial Bridge: Details of Traveler Framing at Top Suspended Car Transfer Ship Canal, Duluth, Minnesota

8. Aerial Bridge: Proposed Changes in Tower Suspended Car Transfer Over Ship Canal at Duluth, Minnesota

9. Aerial Bridge: Proposed Suspended Car Transfer Over Ship Canal at Duluth, Minnesota

10. Aerial Bridge: Strain Diagram, Duluth, Minnesota

11. Aerial Bridge: Structural Details, End View, Part Side Elevation, Duluth, Minnesota

12. Constructing foundation for aerial bridge, Duluth, Minnesota

13. Aerial Bridge Duluth, Minnesota

14. Aerial bridge under construction, Duluth, Minnesota

15. Ice covered south pier, Duluth, Minnesota

16. Aerial Lift Bridge under construction, Duluth, Minnesota

17. View of aerial bridge under construction, Duluth, Minnesota

18. Aerial ferry bridge, Duluth, Minnesota

19. Aerial ferry bridge, Duluth, Minnesota

20. Aerial Bridge Duluth, Minnesota

21. Aerial Lift Bridge from bay, Duluth, Minnesota

22. Aerial Bridge Duluth, Minnesota

23. Aerial Bridge: Entrance To Duluth-Superior Harbor, Duluth, Minnesota

24. Wagon boarding aerial bridge, Duluth, Minnesota

25. Aerial Bridge: Bird's Eye View of Duluth, Minnesota From Boulevard Drive