Rock drill invention by John Christiansen in connection with the Hoosac Tunnel
Dublin Core
Title
Rock drill invention by John Christiansen in connection with the Hoosac Tunnel
Subject
Tunnels -- Massachusetts -- Photographs.
Hoosac Tunnel (Mass.) -- Photographs.
Date
2010-05-06T18:24:47Z
2010-05-06T18:24:47Z
1866
Type
Image
Files
Collection
Citation
“Rock drill invention by John Christiansen in connection with the Hoosac Tunnel,” Digital Commonwealth , accessed May 20, 2013, http://www.digitalcommonwealth.org/items/show/13597.
Comments