161. [Miners drilling inside tunnel]; North Adams 1872 Format: Photographs Collection: Hoosac Tunnel Collection Date: 1872 Institution: North Adams Public Library
162. 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
163. 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
164. 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
165. Nitroglycerin works Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1875] Institution: North Adams Public Library
166. Nitroglycerine factory. West view Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1875] Institution: North Adams Public Library
167. Nitro-Glycerine works ; west shaft ; central shaft ; west portal Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1875] Institution: North Adams Public Library
168. North Adams 1872; [east portal]; east portal; west portal Format: Photographs Collection: Hoosac Tunnel Collection Date: 1872 Institution: North Adams Public Library
169. Person standing in east entry to tunnel Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1879] Institution: North Adams Public Library
170. Person standing on rim of central shaft to Hoosac Tunnel Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1879] Institution: North Adams Public Library
171. Professor Mowbray's nitro-glycerine works; looking south Format: Photographs Collection: Hoosac Tunnel Collection Date: 1867 Institution: North Adams Public Library
172. Profile of Hoosac Mountain, 1875 Format: Drawings/Illustrations Collection: Hoosac Tunnel Collection Date: [1875] Institution: North Adams Public Library
173. Profile of Hoosac Mountain showing tunnel Format: Prints Collection: Hoosac Tunnel Collection Date: (c) 1877 Institution: North Adams Public Library
174. Roof enlargement, east end work Format: Postcards/Cards; Prints Collection: Hoosac Tunnel Collection Date: [ca. 1892–1972] Institution: North Adams Public Library
175. Section of tunnel showing areas Format: Drawings/Illustrations Collection: Hoosac Tunnel Collection Date: [ca. 1860–1879] Institution: North Adams Public Library
176. Stone stairway with details Format: Drawings/Illustrations Collection: Hoosac Tunnel Collection Date: 1874 Institution: North Adams Public Library
177. Three people standing on double track in Little Tunnel Format: Photographs Collection: Hoosac Tunnel Collection Date: [ca. 1860–1879] Institution: North Adams Public Library
178. Tunnel enlargement. west end work Format: Postcards/Cards; Prints Collection: Hoosac Tunnel Collection Date: [ca. 1892–1972] Institution: North Adams Public Library
179. Tunnel heading showing drill carriage Format: Postcards/Cards; Prints Collection: Hoosac Tunnel Collection Date: [ca. 1892–1972] Institution: North Adams Public Library
180. 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