21. All east portal Format: Photographs Collection: Hoosac Tunnel Collection Date: 1872 Institution: North Adams Public Library
22. Arching at west end Hoosac Tunnel Format: Drawings/Illustrations Collection: Hoosac Tunnel Collection Date: [ca. 1860–1879] Institution: North Adams Public Library
23. Boring machine Format: Postcards/Cards; Prints Collection: Hoosac Tunnel Collection Date: [ca. 1892–1972] Institution: North Adams Public Library
24. Central shaft buildings erected after fire in 1867. Format: Postcards/Cards; Prints Collection: Hoosac Tunnel Collection Date: [ca. 1892–1972] Institution: North Adams Public Library
25. Design for arch/entrance of Hoosac Tunnel Format: Drawings/Illustrations Collection: Hoosac Tunnel Collection Date: [ca. 1860–1879] Institution: North Adams Public Library
26. Design for arches/entrance of Hoosac Tunnel Format: Drawings/Illustrations Collection: Hoosac Tunnel Collection Date: [ca. 1860–1879] Institution: North Adams Public Library
27. Diagram of excavation and construction. Hoosac Tunnel, on the Troy and Greenfield R.R. Format: Drawings/Illustrations Collection: Hoosac Tunnel Collection Date: [ca. 1860–1879] Institution: North Adams Public Library
28. Diagrams of excavation and construction. Hoosac Tunnel, on the Troy and Greenfield R.R. Format: Drawings/Illustrations Collection: Hoosac Tunnel Collection Date: [ca. 1860–1879] Institution: North Adams Public Library
29. East end ; west end ; east end Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1875] Institution: North Adams Public Library
30. East end of Hoosac Tunnel Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1879] Institution: North Adams Public Library
31. East end of tunnel & roadbed, cart & folks Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1879] Institution: North Adams Public Library
32. East end; west end; east end Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1875] Institution: North Adams Public Library
33. East portal Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1875] Institution: North Adams Public Library
34. The east portal of the Hoosac Tunnel Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1875] Institution: North Adams Public Library
35. First work on brick arch at west end under B. N. Farren's contract. 1866 Format: Postcards/Cards; Prints Collection: Hoosac Tunnel Collection Date: [ca. 1892–1972] Institution: North Adams Public Library
36. 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
37. 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
38. Hoosac Tunnel. West shaft buildings Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1871–1873] Institution: North Adams Public Library
39. Hoosac Tunnel and surroundings Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1911] Institution: North Adams Public Library
40. Hoosac Tunnel and surroundings Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1911] Institution: North Adams Public Library