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 4
| Title: | 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 4 |
| Author: | Doane, Thomas. |
| URI: | http://hdl.handle.net/2452/48670 |
| Date: | 1864 |
Files in this item
| Files | Size | Format | View |
|---|---|---|---|
| ocn496812677-4.jpg | 2.164Mb | JPEG image |
|