. De re metallica. Metallurgy; Mineral industries. 54 BOOK A—Thin vena dilatata. B—Thick vena dilaiata. Venae profundae vary in direction ; for some run from east to west. South. 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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