A Water-wheel,
and for the use of these boys the accompanying illustrations were drawn.
Figs. 139-141.
Fig. 139 shows a four-sided soft-pine stick, with square ends, and if you have a good sharp knife it requires but little work to trim off the four edges of this stick until it has the form of a six-sided lead-pencil (Fig. 140), after which but little skill is required to whittle the ends down to the size of the hole in a thread-spool (Fig. 141).