Plans numbered from 1 to 4 are details 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 Sheet 2

Digital Collection
URI
Date Issued
1864
Type
Image
Notes
Title supplied by cataloger; Thomas Doane, Chf. Engr.
Organizations / Corporate Body
Doane, Thomas.
File(s)
Thumbnail Image
Name

ocm36498507-373-35-2.jpg

Size

2.14 MB

Format

JPEG

Checksum (MD5)

4e2ec0e778b18084fea64d6ca1ba4ea6