Guy rods or wires can also be carried from the upper part of the trunk down to pegs driven in the ground, which will lend additional support and steadiness to the upright shaft. To start the wheel, snap the ends of the sheets to the spoke ends; to stop it, unsnap the ends and furl the sails around the spokes, and tie them securely with a cotton cord.

A Windmill and Tower

Windmills, of course, can be put to many different uses and are generally of sufficient size to develop a considerable amount of power. Fig. 24 shows a windmill and tower that any smart boy can make of wood, an old buggy wheel, and a few iron fittings that a blacksmith will make at a nominal cost.

The tower is the first thing to make, and it should be constructed of four spruce sticks sixteen feet long and four inches square, thirty inches square at the top and seventy-two inches square at the base.

The deck is thirty-six inches square, and projects two inches over the top rails all around. The rails and cross braces are of spruce or pine strips four inches wide and seven-eighths of an inch thick, and are attached to the corner posts with steel wire nails. The corner posts are embedded two feet in the ground, leaving fourteen feet of tower above the surface. The rail at the bottom, attached to the four posts, is three feet above the ground, and, midway between this and the top rail under the deck, the middle rail is run around the posts.

The cross braces are bevelled at the ends, so that they will fit snugly against the corner posts and in behind the rails where they are securely nailed to both posts and rails.

One of the posts with its binding of rails and cross brace is shown in Fig. 25, and this clearly illustrates how the union is made.

The posts, rails, and braces are all to be planed, so that they will present a good appearance when painted; and at one side of the tower a ladder can be made of scantling, and the lower end of it attached to a rail nailed to the corner posts a few inches above the ground.

Across two of the rails half-way up the tower a board is nailed, to which the lower end of a trunk is made fast, if a wheel similar to the pumping-mill is to be used. But if a wooden mill is desired, it can be constructed from a buggy-wheel and six blades of wood, to appear as shown in the illustration.