heel down firmly, and tack the other piece
slightly.

Procure a thin board 1/4 in. thick, and cut it out as shown in
Fig. 3; then nail it, with pins or small nails, on the center of
one of the square pieces of wood. Fit this to the two pieces just
finished, with the thin wheel down--but first boring a 3/4-in.
hole 1/4 in. deep, in the center of it; and boring a 3/8-in.

[Illustration: Fig. 3]

hole entirely through at the same place. Now put mold No.1 (for
that is what we shall call this mold) in a vise, and bore six
1/4-in. holes through it. Be careful to keep these holes well out
in the solid part, as shown by the black dots in Fig. 1. Take the
mold apart, and clean all the shavings out of it; then bolt it
together, and lay it away to dry.

[Illustration: Fig. 4]

Now take another of the 12-in. square pieces of wood, and cut it
out as shown in Fig. 4, slightly beveled. After it is finished,
place it between two of the 12-in. square pieces of wood, one of
which should have a 3/8-in. hole bored through its center. Then
bolt together with six 1/4-in. bolts, as shown by the

[Illustration: Fig. 5]

black dots in Fig. 4, and lay it away to dry. This is mold No.2.
Now take mold No.1; see that the bolts are all tight; lay it on a
level place, and pour babbitt metal into it, until it is full. Let
it stand for half an hour, then loosen the bolts and remove the
casting.

Now cut out one of the 12-in.-square pieces of wood as shown in
Fig. 5. This is the same as Fig. 1, only the one is left-handed,
the other right-handed. Put this together in mold No.1, instead of
the right-handed piece; and run in babbitt metal again. The
casting thus made will face together with the casting previously
made.

Pour metal into mold No.2. This will cast a paddle-wheel, which is
intended to turn inside of the casting already made.

If there should happen to be any

[Illustration: Fig. 6]

holes or spots, where the casting did not fill out, fill them by
placing a small piece of wood with a hole in it, over the
defective part, and pouring metal in to fill it up.

If you cannot obtain the use of a drill press, take an ordinary
brace, fasten a 3/8-in. drill in it, and bore a hole through the
end of a strip about 2 in. wide and 16 in. long; put the top of
the brace through this hole, and fasten the other end of the strip
to a bench, as shown in illustration. Find the center of the
paddle-wheel, place it under the drill, true it up wi