. De re metallica. Metallurgy; Mineral industries. A—Thin vena dilatata. B—Thick vena dilaiata. Venae profundae vary in direction ; for some run from east to west. South. North A, B, C—Vein. D, E, F—Seams in the Rock (Commissurac Saxorum).. 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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