First automatic pneumatic rock drill used at Hoosac Tunnel
Main Digital Collection
Digital Collection
Date Issued
1865
Item Format
Image
Notes
Title supplied by cataloger; Perfect as a machine but defective in strength, 1865.
Digital Collection
File(s)![undefined]()
Name
ocm36498507-373-36.jpg
Size
17.74 MB
Format
JPEG
Checksum (MD5)
044a79ac0d3283308cf071bf5c365e5b
