Material: Stiff black paper 6 in. x 6 in. (White, or any color, will answer if black cannot be secured); strip of cardboard 1/2 in. x 3 1/2; scissors and a pin.

Half an inch from each end of the cardboard strip make a small hole with the scissors.

Find the center of the 6x6 sheet of paper. (Bisect each side and draw diameters.)

Place a pin in one hole of your circle-divider, and fasten to the center of the paper.

Place a pencil in the other hole and draw a circle. (Fig. I.)

Divide the circumference into three equal parts. (To trisect the circumference, apply the diameter of the circle three times, o, Fig. 2.)

Crease the paper from these dots, in toward the center of the circle for a distance of 1 1/2 inch, (x, Fig. 2.)

On the circle, quarter of an inch to either side of each dot, make a dot, and draw lines s.

Crease the paper on these lines, very sharply. The three-pointed hat, Fig. 3, will result.

Fig. 3.