We plugged the bottom of the leader pipe with a block of wood, in the center of which a large hole was drilled. 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 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.

Fig. 291. Fig 292. Fig. 293.

Fig. 291. The Box Pipe. Fig 292. The Lower Valve. Fig. 293. The Piston Valve.

The Old Windmill at Work on a Lumberville Farm.

The Old Windmill at Work on a Lumberville Farm.