Archive image from page 604 of De re metallica (1950). De re metallica deremetallica50agri Year: 1950 BOOK XII. 567 A—Tanks. B—Stirring poles. C—Plug. D—Trough. E—Reservoir. F—Launder. G—Lead caldron. H—Wooden tubs sunk into the earth. I—Vats in which twigs are fixed.

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