. De re metallica. Metallurgy; Mineral industries. A—Stamps. B—Mortar. C—Plates full of holes. D—Transverse launder. E—Planks full of cup-like depressions. F—Spout. G—Bowl into which the concentrates fall. H—Canvas strake. I—Bowls shaped like a small boat. K—Settling-pit under the canvas strake. So far I have spoken of machines which crush wet ore with iron-shod stamps. I will now explain the methods of washing which are in a measure peculiar to the ore of certain metals, beginning with gold. The ore which contains particles of this metal, and the sand of streams arid rivers which. Please note
. De re metallica. Metallurgy; Mineral industries. A—Stamps. B—Mortar. C—Plates full of holes. D—Transverse launder. E—Planks full of cup-like depressions. F—Spout. G—Bowl into which the concentrates fall. H—Canvas strake. I—Bowls shaped like a small boat. K—Settling-pit under the canvas strake. So far I have spoken of machines which crush wet ore with iron-shod stamps. I will now explain the methods of washing which are in a measure peculiar to the ore of certain metals, beginning with gold. The ore which contains particles of this metal, and the sand of streams arid rivers which. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Agricola, Georg, 1494-1555; Hoover, Herbert, 1874-1964. New York, Dover Publications
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