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009607

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 Georg Bauer (Basle, 1556). Woodcut.

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009607.jpg
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Irish Photo Archive
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3500x5877 / 5.1MB
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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 Georg Bauer (Basle, 1556).  Woodcut.