State Library of Massachusetts:
Hoosac Tunnel West End
State Library of Massachusetts:
Hoosac Tunnel west shaft buildings
State Library of Massachusetts:
Hoosac Tunnel central shaft building
State Library of Massachusetts:
Hoosac Tunnel general view-looking towards dam
State Library of Massachusetts:
Hoosac Tunnel-east end
State Library of Massachusetts:
Deerfield Valley
State Library of Massachusetts:
Hoosac Tunnel: view of machine shop-east end
State Library of Massachusetts:
Hoosac Tunnel compressor building
State Library of Massachusetts:
Hoosac Tunnel dam
State Library of Massachusetts:
Hoosac Mountain section on line of tunnel showing condition of work 1st January 1869
State Library of Massachusetts:
Plan and vertical sections of the central shaft of the Hoosac Tunnel: showing monthly progress in the beginning of the work 1865
State Library of Massachusetts:
Plan showing some of the floors in the central shaft of the Hoosac Tunnel
State Library of Massachusetts:
Shanties at west end
State Library of Massachusetts:
West end
State Library of Massachusetts:
West end
State Library of Massachusetts:
Buildings at west end
State Library of Massachusetts:
Brick yard at west end
State Library of Massachusetts:
West end masonry
State Library of Massachusetts:
West shaft
State Library of Massachusetts:
Engineer's office, east end
State Library of Massachusetts:
East end of Hoosac Tunnel
State Library of Massachusetts:
Dam in Deerfield River
State Library of Massachusetts:
East end buildings: compressor house
State Library of Massachusetts:
Thomas Doane's improved carriage for rock drilling machines
State Library of Massachusetts:
Thomas Doane's improved carriage for rock drilling machines used at Hoosac Tunnel
State Library of Massachusetts:
Clutch for attaching drill bar to rock drills used in the Hoosac Tunnel
State Library of Massachusetts:
Rock drill invention by John Christiansen in connection with the Hoosac Tunnel
State Library of Massachusetts:
First pneumatic rock drill used at the Hoosac Tunnel 1865
State Library of Massachusetts:
First automatic pneumatic rock drill used at Hoosac Tunnel
State Library of Massachusetts:
Plan 4- detail of Harsen's rock drill: with which the first experiments were made in the attempt to invent a successful rock drill for the Hoosac Tunnel 1864
