The pencil should be sharpened as shown at A, Fig. 14. Cut the wood away as to leave about ½ or ⅜ of an inch of the lead projecting; then sharpen it flat by rubbing it against a fine file or a piece of fine emery cloth or sandpaper that has been fastened to a flat stick. Grind it to a sharp edge like a knife blade, and round the corners very slightly, as shown in the figure. If sharpened to a round point, as shown in B, the point will wear away very quickly and make broad lines; when so sharpened it is difficult to draw a line exactly through a point. The lead for the compasses should be sharpened in the same manner as the penciil, but should have its width narrower. Be sure that the compass lead is so secured that, when circles are struck in either direction, but one line will be drawn with the same radius and center.