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
| 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 3 |
| Author: | Doane, Thomas. |
| URI: | http://hdl.handle.net/2452/48669 |
| Date: | 1864 |
Files in this item
| Files | Size | Format | View |
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| ocn496812677-3.jpg | 2.230Mb | JPEG image |
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