Next cut two pieces of wood as in Fig. 307, for the other sides of the windmill. Drill a small hole in each at D about 1½ inches from the top.
On one of these sides mark and paint a door and windows as in Fig. 308, and over the door make a small roof, like the roof over the porch of the signal-box (Chapter XII). The windows and door may be cut out with a fret-saw and the door hinged on by means of a strip of strong linen. Glue and nail these sides in position. Make and fix the roof.
The Sails. For these, two strips of wood, ¼ inch square and 12 inches long, are necessary.
In the centre of each of these, cut a slot half-way through the wood so that one may fit tightly into the other (F in Fig. 309). The sails are made of cardboard, and are rectangular in shape, measuring 5 inches by 2 inches. They are coloured light brown, with dark markings on them, as shown in the plate. Shape each end of the arms of the sails as in Fig. 309. This is easily done by filing, if the wood is fairly soft. Saw half-way through the wood at E, and file, or cut off the wood with a pen-knife. To this flat surface the sails are glued, so that they may be inclined to the wind. Now glue the two arms together, and when they are firm make a hole through the middle, F, where the arms cross. Take a short steel knitting needle, about 6¾ inches; fix one end into this hole with glue; then glue a small piece of cardboard or wood over it, and a cork washer behind, to keep the sails from touching the walls of the windmill; pass the needle through the holes in the sides of the windmill and glue a little knob of wood to the other end to prevent the needle slipping back. If a needle cannot be obtained, an old bicycle spoke, or even a wooden meat skewer, will do, but in the latter case the holes in the walls must be made larger, and the sails fixed to the end of the skewer by a small nail.
Now glue a piece of round rod into the reel (H in Fig. 306) so that it projects about an inch. Place the mill on this stand, so that the rod passes through the hole in the bottom of the mill. The mill can be turned round in any direction so that the sails may catch the wind. Make a small ladder to reach the door.
A very pretty but somewhat more difficult windmill is shown in Fig. 310. It is made of cardboard. The foundation, platform and railings can be made as described in the case of the lighthouse (Chapter XIII).
The truncated hexagonal pyramid forming the body of the windmill is made as follows. With centre O (Fig. 311), and a radius of about 10 inches, describe an arc, A B.
From any point on this arc mark off six spaces, each 2 inches.
