File:AmCyc Boring - drill bit - centre bit.jpg
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| Description |
English: Woodcut/drawing of a drill bit for wood, the centre bit, an instrument of English invention, consists of a centre point, a shearing point, and a broad inclined cutter. |
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| Date | published 1879 | ||||||
| Source | The American Cyclopædia, v. 3, 1879, p. 99 (Fig. 11). | ||||||
| Author | Unknown author | ||||||
| Permission (Reusing this file) |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 17:11, 25 March 2014 | | 163 × 433 (20 KB) | Library Guy | {{Information |Description ={{en|1=Woodcut/drawing of a drill bit for wood, the centre bit, an instrument of English invention, consists of a centre point, a shearing point, and a broad inclined cutter.}} |Source =''The American Cyclopædia'... |
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