re fastened to it, as
shown in Fig. 18. The screws used should be brass, since iron screws
will rust and cause trouble. Three screws should be used for each side
board, and they should be driven into the bow piece so that the screws
on one side will not interfere with those on the other. The first
cross-piece is then screwed in place, as shown in Fig. 19. The second
and third cross-pieces are then screwed in place and the back or stern
piece attached. The bottom of the boat is then carefully put in place
with small screws. It will be noticed that the bottom board of the boat
is cut to fit the inside of the bottom. It is held in place with small
brass brads. The crevices or seams along the bottom of the boat should
be carefully covered with pitch or marine glue to prevent leakage when
the boat is in the water. The bow of the boat should be finished off
nicely to a point with a heavy file or a wood-rasp.

This type of hull is extremely easy to produce and it is capable of
carrying a considerable load. However, it is not a good type to use for
all kinds of boats. It makes a splendid little pleasure yacht or
submarine-chaser, but for a torpedo-boat destroyer or a freighter it
would not be suitable.

The young model boat builder is advised not to try to construct hulls
from metal. This is a very difficult task even for the thoroughly
experienced mechanic. Wood is much easier to work with and will produce
the same results.

CHAPTER III

HOW TO MAKE SIMPLE BOATS, WITH AND WITHOUT POWER DRIVE

THIS Chapter will be devoted to the construction of very simple types of
boats. The boats described will be constructed largely with blocks of
wood cut into various shapes and sizes. The results obtainable by this
method of construction are surprising, and there are few types of boats
that cannot be modeled by following the method. After the model-builder
has constructed a few boats along this principle he will be able to
duplicate the general appearance of almost any craft he sees by
carefully planning and cutting the blocks he uses.

The first boat described is a submarine. This is shown in Fig. 20. Four
blocks of wood form the basis of its construction, and these are cut
from 1-inch stock, as shown in the drawing. Such a submarine can be
made practically any size up to 12 inches in length. Beyond this size
they begin to look out of proportion and they are more difficult to
propel. After nailing the blocks together as sho