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1. Bench carriage. West shaft, Hoosac Tunnel. Feb. 22d, 1874

2. Bench carriage. West shaft, Hoosac Tunnel. Feb. 22nd, 1871

3. Car for cage west shaft

4. Central shaft…well of the shaft

5. Forgings of cages of west shaft. Hoosac Tunnel…June 1st, 1864

6. Front and side view of crank; shaft for heavy gearing

7. General plan of guide frame for buckets at central shaft. Chief engineer office. Hoosac Tunnel. May 21st, 1866

8. Standard for the alignment at the upper floor of central shaft Hoosac Tunnel

9. Standards for surface alignment piers adjacent to central shaft Hoosac Tunnel

10. Standards for the alignment at upper floor of central shaft

11. Straps &c. for 4 in. plunger pump at central shaft. For details see tracing dated Jan. 26, 1867

12. Untitled [earth bucket or cage?]

13. Untitled [machinery]

14. Untitled, parts labeled [benne a eau; 2 attache de benne; 3 crochet de benne; 4 benne a terrassement; 5 benne de terrassement...

15. Untitled [three drawings on one page, showing machinery made to fit on rails, possibly for central shaft]

16. Walking beam for central shaft pumping arrangement. Chief engineers office Hoosac Tunnel. Jan. 1st 1867

17. Mica mines

18. Mica mines

19. Mica mines

20. Mica mines