Fig. 291. The Box Pipe.
We plugged the bottom of the leader pipe with a block of wood, in the center of which a large hole was drilled.
Fig. 292. The Lower Valve. The hole was covered with a piece of leather nailed at one side, so that it could lift up to let water into the pipe. The piston was made of
Fig. 293. The Piston Valve. a disk of wood of slightly smaller diameter than the inside of the pipe, and over it was fastened a piece of leather just large enough to fit snugly against the walls of the pipe. This piston was fastened to a wooden rod long enough to reach from well within the pipe to the wind wheel shaft. A strip of brass was bent over the crank, or U-shaped bend in the shaft, and its ends were fastened to the rod.
The Old Windmill at Work on a Lumberville Farm.
Action of the Pump.