. De re metallica. Metallurgy; Mineral industries. BOOK VI. 179. A—Posts. B—Axle. C—Wooden bars. D—Piston rod. E—Short piece of F—Drain. G—This MA^^ is diverting the water which is flowing out of the to prevent it from flowing into the trenches which are being dug. WOOD. drain, ovi^n weight, the piston is pushed in. In this way, the water which the pipe contains is drawn through the openings in the disc and emptied by the piston through the spout into the drain. There are some who place a hand-bar underneath in place of the short piece of wood. This pump, as also the last before described, is
. De re metallica. Metallurgy; Mineral industries. BOOK VI. 179. A—Posts. B—Axle. C—Wooden bars. D—Piston rod. E—Short piece of F—Drain. G—This MA^^ is diverting the water which is flowing out of the to prevent it from flowing into the trenches which are being dug. WOOD. drain, ovi^n weight, the piston is pushed in. In this way, the water which the pipe contains is drawn through the openings in the disc and emptied by the piston through the spout into the drain. There are some who place a hand-bar underneath in place of the short piece of wood. This pump, as also the last before described, is less generally used among miners than the others. The fourth kind is not a simple pump but a duplex one. It is made as follows. A rectangular block of beechwood, five feet long, two and a half feet wide, and one and a half feet thick, is cut in two and hollowed out wide and deep enough so that an iron axle with cranks can revolve in it. The axle is placed between the two halves of this box, and the first part of the axle, which is in contact with the wood, is round and the straight end forms a journal. Then the axle is bent down the depth of a foot and again bent so as to continue straight, and at this point a round piston-rod hangs from it; next it is bent up as far as it was bent down ; then it continues a httle way straight again, and then it is bent up a foot and again continues straight, at which point a second round piston-rod is hung from it ; afterward it. 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
Size: 1537px × 1625px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthoragricolageorg14941555, bookcentury1900, booksubjectmin
