009596
Washing for gold by laying pieces of turf in a frame. Gold-bearing sand is placed in head of the frame at A, water is then allowed to wash over it. Gold collected on the turf at C. The pieces of turf then washed individually at E and the gold recovered. From 'De re metallica', by Agricola, pseudonym of Georg Bauer (Basle, 1556). Woodcut.
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