Ore which has been broken up in a stamping mill

Ore which has been broken up in a stamping mill being reduced further by passing through a grinding mill. The mill is driven by a water wheel, out of the picture to right, through axle, A. Told and tin ore were treated in this way. From De re metallica, by Agricola, pseudonym of Georg Bauer (Basle, 1556). Woodcut

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1556 Agricola Axle Basle Bauer Driven Further Grinding Metallica Pseudonym Reduced Stamping Switzwerland Told Treated

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