File:AmCyc Boring - drill bit - screw auger (1).jpg
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| Description |
English: Woodcut/drawing of a drill bit for wood in the form of a screw: the screw auger (first version), formed of a flat band of steel twisted when red hot. |
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| Date | published 1879 | ||||||
| Source | The American Cyclopædia, v. 3, 1879, p. 99 (Fig. 14). | ||||||
| Author | Unknown author | ||||||
| Permission (Reusing this file) |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 17:34, 25 March 2014 | | 82 × 563 (16 KB) | Library Guy | {{Information |Description ={{en|1=Woodcut/drawing of a drill bit for wood in the form of a screw: the screw auger (first version), formed of a flat band of steel twisted when red hot.}} |Source =''The American Cyclopædia'', v. 3, 1879, p.... |
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