. De re metallica. Metallurgy; Mineral industries. 3o8 BOOK A—Beams. B—Canvas. C—Head of strake. D—Small lau.'^der. E—Settling PIT OR TANK. F—Wooden scrubber. G—Tubs. the second division, the third is similarly laid, and so on, one on the other. If they are laid in the opposite way, the water flowing down carries the concentrates or particles of tin-stone under the canvas, and a useless task is attempted. Boys or men throw the concentrates or tin-stuff mixed with mud into the head of the strake, after the canvas has been thus stretched, and having opened the small launder they let the w
. De re metallica. Metallurgy; Mineral industries. 3o8 BOOK A—Beams. B—Canvas. C—Head of strake. D—Small lau.'^der. E—Settling PIT OR TANK. F—Wooden scrubber. G—Tubs. the second division, the third is similarly laid, and so on, one on the other. If they are laid in the opposite way, the water flowing down carries the concentrates or particles of tin-stone under the canvas, and a useless task is attempted. Boys or men throw the concentrates or tin-stuff mixed with mud into the head of the strake, after the canvas has been thus stretched, and having opened the small launder they let the water flow in ; then they stir the concentrates or tin-stone with a wooden scrubber till the water carries them all on to the canvas ; next they gently sweep the linen with the wooden scrubber untU the mud flows into the setthng-pit or into the transverse launder. As soon as there is little or no mud on the canvas, but only concentrates or tin-stone, they carry the canvas away and wash it in a tub placed close by. The tin-stone settles in the tub, and the men return immediately to the same task. Finally, they pour the water out of the tub, and collect the concentrates or tin-stone. However, if either concentrates or tin-stone have washed down from the canvas and settled in the settling- pit or in the transverse launder, they wash the mud again. Some neither remove the canvas nor wash it in the tubs, but place over. 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: 1544px × 1619px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthoragricolageorg14941555, bookcentury1900, booksubjectmin
