File:AmCyc Boring - diamond drill bit (2).jpg
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| Description |
English: Woodcut/drawing of a diamond drill bit, the invention of Rodolphe Leschot of Paris. |
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| Date | published 1879 | ||||||
| Source | The American Cyclopædia, v. 3, 1879, p. 101 (Fig. 23). | ||||||
| Author | unknown artist; the bit is the invention of Rodolphe Leschot of Paris | ||||||
| Permission (Reusing this file) |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:33, 25 March 2014 | | 442 × 328 (47 KB) | Library Guy | {{Information |Description ={{en|1=Woodcut/drawing of a diamond drill bit, the invention of Rodolphe Leschot of Paris.}} |Source =''The American Cyclopædia'', v. 3, 1879, p. 101 (Fig. 23). |Author =unknown artist; the bit is the inv... |
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