A—POSTS. B—AXLE. C—WOODEN BARS. D—PISTON ROD.
E—SHORT PIECE OF WOOD.
F—DRAIN. G—THIS MAN IS DIVERTING THE WATER WHICH IS FLOWING OUT OF THE DRAIN,
TO PREVENT IT FROM FLOWING INTO THE TRENCHES WHICH ARE BEING DUG.
own weight, the piston is pushed in. In this way, the water which the pipe
contains is drawn through the openings in the disc and emptied by the piston
through the spout into the drain. There are some who place a hand-bar
underneath in place of the short piece of wood. This pump, as also the last
before described, is less generally used among miners than the others.
F—DRAIN. G—THIS MAN IS DIVERTING THE WATER WHICH IS FLOWING OUT OF THE DRAIN,
TO PREVENT IT FROM FLOWING INTO THE TRENCHES WHICH ARE BEING DUG.
own weight, the piston is pushed in. In this way, the water which the pipe
contains is drawn through the openings in the disc and emptied by the piston
through the spout into the drain. There are some who place a hand-bar
underneath in place of the short piece of wood. This pump, as also the last
before described, is less generally used among miners than the others.
The fourth kind is not a simple pump but a duplex one.
It is made as
follows. A rectangular block of beechwood, five feet long, two and a half
feet wide, and one and a half feet thick, is cut in two and hollowed out wide
and deep enough so that an iron axle with cranks can revolve in it. The axle
is placed between the two halves of this box, and the first part of the axle,
which is in contact with the wood, is round and the straight end forms a
journal. Then the axle is bent down the depth of a foot and again bent so
as to continue straight, and at this point a round piston-rod hangs from it;
next it is bent up as far as it was bent down; then it continues a little way
straight again, and then it is bent up a foot and again continues straight,
at which point a second round piston-rod is hung from it; afterward it
follows. A rectangular block of beechwood, five feet long, two and a half
feet wide, and one and a half feet thick, is cut in two and hollowed out wide
and deep enough so that an iron axle with cranks can revolve in it. The axle
is placed between the two halves of this box, and the first part of the axle,
which is in contact with the wood, is round and the straight end forms a
journal. Then the axle is bent down the depth of a foot and again bent so
as to continue straight, and at this point a round piston-rod hangs from it;
next it is bent up as far as it was bent down; then it continues a little way
straight again, and then it is bent up a foot and again continues straight,
at which point a second round piston-rod is hung from it; afterward it
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