To adjust the wheel, place the top bar across the bath-tub and then slip the shaft in the hole in the hanging-bar, sliding the other end of the shaft into the slot shown in Fig. 145.
Figs. 146-149.
If the water is now allowed to run slowly from the faucet and fall upon the inside paddles it will set the wheel in motion, and this motion can be transmitted to any small and simple piece of machinery by means of a belt running from the spool which is attached to the wheel to a similar spool, attached to the machine.
The Circus Performers.
If you Make a Frame,
similar to that which holds the water-wheel, (Fig. 144) and make it with much shorter hanging-bars, it will not be necessary to support them with the diagonal pieces. This second frame can be reversed over the first frame, so that the hanging-bars will set upright upon the cross-bar, and when in that position a small horizontal bar may be made to revolve by connecting a spool placed upon this bar with the spool upon the wheel-shaft, by means of a string loop. If this string is not too loose, nor yet too tight, it will turn the top spool as soon as the water sets the wheel and the bottom spool in motion. The [illustration on page 196] shows how a number of funny animals and men can be made to do circus tricks on the bar, to the great delight of the spectators.
Figs. 150-153.