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![]() | 1,856 × 2,784 (140 KB) | Materialscientist | {{Information |Description ={{en|1=The rock drill patented by De Volson Wood}} |Source =De Volson Wood "Rock-drill" US patent 319653 Issue date: Jun 9, 1885 |Author =De Volson Wood |Date =1885 |Permission = |other_versions |
Original file (1,856 × 2,784 pixels, file size: 140 KB, MIME type: image/png)
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 10:40, 15 November 2011 |
![]() | 1,856 × 2,784 (140 KB) | Materialscientist | {{Information |Description ={{en|1=The rock drill patented by De Volson Wood}} |Source =De Volson Wood "Rock-drill" US patent 319653 Issue date: Jun 9, 1885 |Author =De Volson Wood |Date =1885 |Permission = |other_versions |