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EXPLANATION OF PLATES.
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| d | Charcoal fire, used to soften or melt the cement. |
| e | Tongs. |
DIAMOND POLISHER.
| No. | 1. | The tongs holding the dopp and diamond. |
| 2. | The dopp. | |
| 3. | The skive, or horizontal mill. | |
| 4. | A Diamond being polished on the mill. | |
| 5. | Lead weights on the tongs, to increase pressure. | |
| 6. | Steel mortar for reducing diamonds to powder. | |
| 7. | Glasses containing olive oil and diamond powder. | |
| 8. | and 9. Iron pins, against which the tongs press when the skive is in motion. | |
| 10. | The strap and spindle. | |
| 11. | The frame. |
