De Re Metallica
Method for separating silver from copper by alloying it with lead, from 1912 English translation of Georgius Agricola's DE RE METALLICA (1556) by Herbert Clark Hoover and Lou Henry Hoover.
| Date taken: | 1901 |
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| Size: | 1206 x 1280 pixels (16.8 x 17.8 inches) |
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