21. General diagram of arch for B.N. Farren's contract. Hoosac Tunnel Format: Drawings/Illustrations Collection: Hoosac Tunnel Collection Date: 1875 Institution: North Adams Public Library
22. Hoosac Mountain - section on line of tunnel showing condition of work 1st January 1869 Format: Prints Collection: Hoosac Tunnel Collection Date: [1869] Institution: North Adams Public Library
23. Hoosac Tunnel. West shaft buildings Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1871–1873] Institution: North Adams Public Library
24. Hoosac Tunnel and surroundings Format: Drawings/Illustrations Collection: Hoosac Tunnel Collection Date: [ca. 1860–1911] Institution: North Adams Public Library
25. Hoosac Tunnel and surroundings Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1911] Institution: North Adams Public Library
26. Hoosac Tunnel and surroundings Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1911] Institution: North Adams Public Library
27. Hoosac Tunnel and surroundings Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1911] Institution: North Adams Public Library
28. Hoosac Tunnel and surroundings Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1911] Institution: North Adams Public Library
29. Hoosac Tunnel and surroundings Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1911] Institution: North Adams Public Library
30. Hoosac Tunnel and surroundings Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1911] Institution: North Adams Public Library
31. Hoosac Tunnel and surroundings Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1911] Institution: North Adams Public Library
32. Hoosac Tunnel and surroundings Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1911] Institution: North Adams Public Library
33. Hoosac Tunnel and surroundings Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1911] Institution: North Adams Public Library
34. Hoosac Tunnel and surroundings Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1911] Institution: North Adams Public Library
35. Hoosac Tunnel and surroundings Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1911] Institution: North Adams Public Library
36. Hoosac Tunnel and surroundings Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1911] Institution: North Adams Public Library
37. Hoosac Tunnel and surroundings. Steam driven air compressors at west end of tunnel Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1911] Institution: North Adams Public Library
38. Hoosac Tunnel and surroundings. The burleigh drill at work Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1911] Institution: North Adams Public Library
39. Hoosac Tunnel and surroundings. West end Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1911] Institution: North Adams Public Library
40. Hoosac Tunnel central shaft section on transverse diameter Format: Drawings/Illustrations Collection: Hoosac Tunnel Collection Date: [ca. 1860–1879] Institution: North Adams Public Library