81. Interior view: showing heading and miners drilling Creator: Hurd & Smith's Excelsior Gallery Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1879] Institution: North Adams Public Library
82. [Miners drilling inside tunnel]. North Adams 1872 Format: Photographs Collection: Hoosac Tunnel Collection Date: 1872 Institution: North Adams Public Library
83. [Miners drilling inside tunnel]; North Adams 1872 Format: Photographs Collection: Hoosac Tunnel Collection Date: 1872 Institution: North Adams Public Library
84. Mountains of rock taken from western shaft of Hoosac Tunnel, No. Adams, Mass. the total weight of the rock taken from Hoosac Tunnel was about 2,000,00 tons Format: Photographs; Postcards/Cards Collection: Hoosac Tunnel Collection Date: [ca. 1892–1972] Institution: North Adams Public Library
85. Mountains of rock taken from western shaft of Hoosac Tunnel, No. Adams, Mass. the total weight of the rock taken from Hoosac Tunnel was about 2,000,00 tons Format: Photographs; Postcards/Cards Collection: Hoosac Tunnel Collection Date: [ca. 1892–1972] Institution: North Adams Public Library
86. Mountains of rock taken from western shaft of Hoosac Tunnel, No. Adams, Mass. the total weight of the rock taken from Hoosac Tunnel was about 2,000,000 tons Format: Photographs; Postcards/Cards Collection: Hoosac Tunnel Collection Date: [ca. 1892–1972] Institution: North Adams Public Library
87. Nitroglycerin works Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1875] Institution: North Adams Public Library
88. Nitroglycerine factory. West view Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1875] Institution: North Adams Public Library
89. Nitro-Glycerine works ; west shaft ; central shaft ; west portal Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1875] Institution: North Adams Public Library
90. North Adams 1872; [east portal]; east portal; west portal Format: Photographs Collection: Hoosac Tunnel Collection Date: 1872 Institution: North Adams Public Library
91. Professor Mowbray's nitro-glycerine works; looking south Format: Photographs Collection: Hoosac Tunnel Collection Date: 1867 Institution: North Adams Public Library
92. Profile of Hoosac Mountain, 1875 Format: Drawings/Illustrations Collection: Hoosac Tunnel Collection Date: [1875] Institution: North Adams Public Library
93. Profile of Hoosac Mountain showing tunnel Format: Prints Collection: Hoosac Tunnel Collection Date: (c) 1877 Institution: North Adams Public Library
94. Stone stairway with details Format: Drawings/Illustrations Collection: Hoosac Tunnel Collection Date: 1874 Institution: North Adams Public Library
95. Untitled [timber framing and some brickwork for the west portal; six drawings on page] Format: Drawings/Illustrations Collection: Hoosac Tunnel Collection Date: [ca. 1860–1879] Institution: North Adams Public Library
96. Untitled [timber framing for the west end six drawings on page] Format: Drawings/Illustrations Collection: Hoosac Tunnel Collection Date: [ca. 1860–1879] Institution: North Adams Public Library
97. West end ; west end ; west end ; North Adams Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1875] Institution: North Adams Public Library
98. West end Hoosac Tunnel Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1875] Institution: North Adams Public Library
99. West end of tunnel showing brick lining, some debris & people Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1879] Institution: North Adams Public Library
100. West entrace of arch looking out Creator: Hurd & Smith's Excelsior Gallery Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1879] Institution: North Adams Public Library