Next take a lath or stick of some kind, which is of such length that it will rest securely when laid across from side to side of the bath-tub. To this stick tack two others, as shown in Fig. 144. These hanging-bars must be long enough to allow the water-wheel to be suspended just below the faucet of the bath-tub. Strengthen your hanging-bars (Fig. 144) by two diagonal pieces. Fig. 145 shows how to cut a notch near the lower end of one hanging-bar, and a hole is bored near the end of the opposite hanging-bar. [Illustration: FIGS. 144 and 145.] 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. [Illustration: 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. [Illustration: 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. [Illustration: FIGS. 150-153.] Figures Which Move. To make these figures so that they will move with comical, but natural, movements, place a piece of transparent paper over the diagrams and trace the outlines, then blacken another piece of paper, upon one side, with a soft pencil; next place a piece of clean card-board under these figures, over the card-board spread the paper, with the blackened side next to the card-board, and over this put the tracing paper, and then, holding it so that it will not slip, follow the lines of the clown, ape, and donkey, with the point of a hard pencil. When the card-board is removed the bodies of the clown, ape, and donkey will appear traced upon the white surface.[12] In the same manner make tracings of the legs and arms of the puppets, and with your scissors cut these figures out. Using the legs and arms cut from the card-board as patterns, trace around each of them upon another piece of card-board with a pencil, and cut these duplicates out. You will now have two each of Figs. 147, 148, 151, 152, 155 and 156.