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41. B&M R.R. west towards tunnel, crossing tender, Jere W. Buckley

42. Bridge over Merrimac

43. Looking south toward tunnel under High Street

44. North end of RR tunnel, High St. above

45. South end of RR tunnel, Vernon St. above

46. South end of tunnel

47. Train exiting tunnel at south end of tunnel under Vernon St., before 1906

48. 1 Profil du souterrain. 2 chandelier a cremalliere 3 profil du souterrain avec les ordonnes calculees 4 clou a tete percee 5...

49. All east portal

50. Arching at west end Hoosac Tunnel

51. Bird's eye view of tunnel, store, &c

52. Bird's-eye view of east portal

53. Bird's-eye view of east portal

54. Boring machine

55. Central shaft

56. Central shaft at the time of fire, 1867, 583 feet deep

57. Central shaft buildings erected after fire in 1867.

58. Design for arch/entrance of Hoosac Tunnel

59. Design for arches/entrance of Hoosac Tunnel

60. Diagram of excavation and construction. Hoosac Tunnel, on the Troy and Greenfield R.R.