Fig. 143.
On to one or both ends of the shaft you may now slip wooden spools, pushing them up the stick until they fit tightly, and leave a projecting end of the shaft sticking out of the end of the spool.
Hanging-Bars.
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.
Figs. 144 and 145.