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 3

URI
Main Digital Collection
Digital Collection
Date Issued
1864
Item Format
Image
Notes
Title supplied by cataloger; Thomas Doane, Chf. Engr.
Organizations / Corporate Body
Doane, Thomas.
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ocm36498507-373-35-3.jpg

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