. De re metallica. Metallurgy; Mineral industries. BOOK A—Sills. B—Pointed stakes. C—Cross-beams. D—Upright Planks. E—Hollows. F—Winds. G—Covering disc. H—Shafts. I—Machine without a covering. The second machine of this genus turns the blowing wind into a shaft through a long box-shaped conduit, which is made of as many lengths of planks, joined together, as the depth of the shaft requires ; the joints are smeared with fat, glutinous clay moistened with water. The mouth of this con- duit either projects out of the shaft to a height of three or four feet, or it does not project; if it proj
. De re metallica. Metallurgy; Mineral industries. BOOK A—Sills. B—Pointed stakes. C—Cross-beams. D—Upright Planks. E—Hollows. F—Winds. G—Covering disc. H—Shafts. I—Machine without a covering. The second machine of this genus turns the blowing wind into a shaft through a long box-shaped conduit, which is made of as many lengths of planks, joined together, as the depth of the shaft requires ; the joints are smeared with fat, glutinous clay moistened with water. The mouth of this con- duit either projects out of the shaft to a height of three or four feet, or it does not project; if it projects, it is shaped Uke a rectangular funnel, broader and wider at the top than the conduit itself, that it may the more easily gather the wind ; if it does not project, it is not broader than the conduit, but planks are fixed to it away from the direction in which the wind is blowing, which catch the wind and force it into the conduit. The third of this genus of machine is made of a pipe or pipes and a barrel. Above the uppermost pipe there is erected a wooden barrel, four. 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
