| Machine shop. | 
					
				| Blacksmith shop, &c., east end. | 
					
				| Blacksmith shop, &c., east end. | 
					
				| East end--miners going in. | 
					
				| East end--miners going in. | 
					
				| East end--near view. | 
					
				| West entrance of arch looking out. | 
					
				| West entrance of arch. | 
					
				| West entrance of arch. | 
					
				| View from Rock Arbor--looking down str. | 
					
				| West portal--showing archway. | 
					
				| West portal--entrance. | 
					
				| West portal--entrance. | 
					
				| Fearful bridge. | 
					
				| Workers at mouth of tunnel. | 
					
				| Hoosac Tunnel--interior view. | 
					
				| Hoosac Tunnel--interior view, showing drill carriage and pipes. | 
					
				| The "N.C.Munson," first engine through Hoosac tunnel, February 9th, 1875. | 
					
				| Deerfield river, looking up. | 
					
				| Portal. | 
					
				| Buildings and tracks near the tunnel. | 
					
				| View of construction. | 
					
				| View of construction. | 
					
				| Hoosac Tunnel, Mass. | 
					
				| Men and children posed at the blacksmith's shop at the east end of the tunnel. | 
					
				| Deerfield valley, looking north. | 
					
				| Construction view of the east side. | 
					
				| Natural bridge. | 
					
				| Machinery for compressing air, central shaft. | 
					
				| Entrance to tunnel, west end. |