Stock Photo: Mine drainage. Man in centre left of picture is boring lengths of wood with borers and augers to form pipes. Man on centre right is working the piston rod of a suction pump to raise water from a mine. In the left foreground are lengths of pipe to be joined, and various internal pump parts. From De r

Stock Photo: 1746-1931 Mine drainage. Man in centre left of picture is boring lengths of wood with borers and augers to form pipes. Man on centre right is working the piston rod of a suction pump to raise water from a mine. In the left foreground are lengths of pipe to be joined, and various internal pump parts. From De r