Now, put up or "step" another mast and sail like the first, about as far from the stern as the first is from the bow. Turn the two sails at an angle of forty-five degrees across the boat (B or C, [Fig. 141]) and set her adrift. She will make considerable progress across the course of the wind, although she will at the same time drift with it. If she wholly refuses to go in the right direction, place a light weight on her bow, so that she will be a little "down by the head," or move the aftermost mast and sail a little nearer to the stern.

Fig. 142.—Tacking.

The little rude affair thus used for experiment will not actually make any progress to windward, because she is so light that she moves sidewise almost as easily as she does forward. With a larger, deeper boat, and with sails which can be set at any angle, the effect will be different. So long as the wind presses against the after side of the sail, the boat will move through the water in the direction of the least resistance, which is forward. A square sail having the mast in the middle was easiest to begin with for purposes of explanation; but now we will change to a "fore-and-aft" rig—that is, one with the mast at the forward edge or "luff" of the sail, as in [Fig. 142]. Suppose the sail to be set at the angle shown, and the wind blowing as the arrow points. The boat cannot readily move sidewise, because of the broadside resistance; she does not move backward, because the wind is pressing on the aftermost side of the sail. So she very naturally moves forward. When she nears buoy No. 1, the helmsman moves the "tiller," or handle of the rudder, toward the sail. This causes the boat to turn her head toward buoy No. 2, the sail swings across to the other side of the boat and fills on that side, which now in turn becomes the aftermost, and she moves toward buoy No. 2 nearly at right angles to her former course. Thus, through a series of zigzags, the wind is made to work against itself. This operation is called "tacking," or "working to windward," and the act of turning, as at the buoys No. 1 and No. 2, is called "going about."

It will be seen, then, that the science of sailing lies in being able to manage a boat with her head pointing at any possible angle to or from the wind. Nothing but experience can teach one all the niceties of the art, but a little aptitude and address will do to start with, keeping near shore and carrying little sail.

Simplest Rig Possible

I will suppose that the reader has the use of a broad, flat-bottomed boat without any rudder. (See [Fig. 143].) She cannot be made to work like a racing yacht under canvas, but lots of fun can be had out of her.

Do not go to any considerable expense at the outset. Procure an old sheet, or an old hay cover, six or eight feet square, and experiment with that before spending your money on new material. If it is a sheet, and somewhat weakly in its texture, turn all the edges in and sew them, so that it shall not give way at the hems. At each corner sew on a few inches of strong twine, forming loops at the angles. Sew on, also, eyelets or small loops along the edge which is intended for the luff of the sail, so that it can be laced to the mast.

You are now ready for your spars, namely, a mast and a "sprit," the former a couple of feet longer than the luff of the sail, and the latter to be cut off when you find how long you want it. Let these spars be of pine, or spruce, or bamboo—as light as possible, especially the sprit. An inch and a half diameter will do for the mast, and an inch and a quarter for the sprit, tapering to an inch at the top. To "step" the mast, bore a hole through one of the thwarts (seats) near the bow and make a socket or step on the bottom of the boat, just under the aforesaid hole—or if anything a trifle farther forward—to receive the foot of the mast. This will hold the mast upright, or with a slight "rake" aft.