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1. Arrangement of air compressor for west shaft

2. Arrangement of hoisting gear and air compressor for central shaft

3. Blacksmith's shop at the east end of the Hoosac Tunnel

4. Brick yard at west end

5. Buildings at west end

6. Cars used in carrying stone from Hoosac Tunnel headings up the west shaft, to the dumping ground 1864

7. Clutch for attaching drill bar to rock drills used in the Hoosac Tunnel

8. Dam in Deerfield River

9. Deerfield Valley

10. Derrick car used for loading stone at the east end of Hoosac Tunnel 1864

11. Details of instrument houses used in surface alignment of the Hoosac Tunnel

12. Double house for Hoosac Tunnel laborers: walls were made 12 feet high instead of 10, as here shown

13. East end buildings : compressor house

14. East end of Hoosac Tunnel

15. Elevation & section of air compressor no. 2 designed for ventilating air at low pressure for Hoosac Tunnel 1865

16. Elevation and some sections of the dam built in the Deerfield River to secure a water power for compressing air for the Hoosac...

17. Engineer's office, east end

18. First automatic pneumatic rock drill used at Hoosac Tunnel

19. First class shanty built for Hoosac Tunnel laborers 1864

20. First pneumatic rock drill used at the Hoosac Tunnel 1865