. De re metallica. Metallurgy; Mineral industries. A B, C, D, E—Five waxed circles of the orbis. F—Opening of same. G—Screw. H—Perforated 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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Keywords: ., bookauthoragricolageorg14941555, bookcentury1900, booksubjectmin