. De re metallica. Metallurgy; Mineral industries. BOOK A—Descending into the shaft by ladders. B—By sitting on a stick. C—By SITTING ON THE DIRT. D—DESCENDING BY STEPS CUT IN THE 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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