Stock Photo: A rag-and-chain pump powered by an overshot water wheel being used to drain a mine. On the right is a detail of the tube of the pump. From De re metallica, by Agricola, pseudonym of Georg Bauer (Basle, 1556). Woodcut

Stock Photo: 1746-1928 A rag-and-chain pump powered by an overshot water wheel being used to drain a mine.  On the right is a detail of the tube of the pump. From De re metallica, by Agricola, pseudonym of Georg Bauer (Basle, 1556).  Woodcut