Stock Photo: Draining mine workings with a bank of three suction pumps. As the men turn the shaft the cams, B, connect with tappets. A, on the piston rods, C. From De re metallica, by Agricola, pseudonym of Georg Bauer (Basle, 1556). Woodcut.
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Image Number: 1746-1930 Rights Managed Credit:World History Archive
009616-p Model Release: No Property Release: No