60. Making Curved Edges.

—To make curved edges on a board, finger-gage on each side lines which shall indicate the amount of curvature. [Fig. 113].

Fig. 113.

If the curve is to be a gradual one reaching from one of these lines over the middle of the edge to the other two lines should also be finger-gaged on the edge. Finger-gage from each side using a distance equal to one-fourth the whole thickness of the piece.

Fig. 114.

Fig. 115.

With the spokeshave, [Fig. 114], carefully cut off the two arrises to the pencil lines so as to form two bevels. This gives three surfaces to the edge of the board. Estimating the amount with the eye, cut off the two arrises formed by these three surfaces until five equal surfaces are formed in their place. This process may be repeated until the surface of the edge is practically a curved surface. With a piece of sandpaper held as shown in [Fig. 115], rub until the surface is smooth and evenly curved.