Collection:Hoosac Tunnel Collection / Institution:North Adams Public Library / Subject:Drilling & boring machinery - Digital Commonwealth Search Results

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Your search: Collection Hoosac Tunnel Collection ✖ Institution North Adams Public Library ✖ Subject Drilling & boring machinery ✖

1. Boring machine

2. Driving head

3. Driving head

4. Driving head in position

5. Header

6. Header

7. Header used to "drive" tunnel

8. Hoosac Tunnel, its surroundings, workers, and machinery

9. Hoosac Tunnel, its surroundings, workers, and machinery

10. Hoosac Tunnel, its surroundings, workers, and machinery

11. Hoosac Tunnel, its surroundings, workers, and machinery. Drilling machine at heading

12. Hoosac Tunnel, its surroundings, workers, and machinery. Drilling machine at heading

13. Hoosac Tunnel, its surroundings, workers, and machinery. Drilling machine at heading