and make this slot large enough so the cord will not rub against the sides (Fig. 63).
Pulley-Wheels for attaining different speeds can be made of spools of various sizes. A bicycle wheel with the tire removed, mounted in a frame, is excellent for a large wheel.
Connecting up the Water-Motor. If you operate the water-motor in the kitchen sink, you can either build a platform as shown in Fig. 61, to bring the spout of the varnish-can case up to the level of the faucet, or you can set the water-motor in the sink and lead a piece of rubber tubing from the spout to the faucet, as shown in Fig. 68.
Figs. 68-69.—How to Make a Water-tight Connection between Faucet and Water Motor.
If you use the latter arrangement, slip the lower end of the rubber tubing over a short piece of glass, brass, or tin tubing, and stick the short tubing through a hole in a cork large enough to fit the spout of the varnish-can case (Fig. 69). If you raise the water-motor high enough so the faucet will set down into the spout, you can cut a large enough hole for the faucet, through a cork, and then fit the cork in the spout as shown in Fig. 64.
Another Water-Motor. The little water-motor in Fig. 70 will furnish sufficient power to operate simple mechanical toys.
