Stock Photo: Draining mine workings by means of a battery of three pumps. The axle, B, is powered by an overshot water wheel. The cams on the axle raise and lower the piston rods by means of tappets. C is the bottom of the pipe which is encased in the basket, D. From De re metallica, by Agricola, pseudonym of Ge

1746-1921 Rights Managed
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  • 11.66" x 19.59"
  • 300 dpi
  • 58.8MB
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