Fig. 155 First make the drawing of the exercise, and in doing this, all the polygons as shown need not be adhered to, but it is very important that the square should be made, though the boring in the square can be omitted at the discretion of the teacher.

A piece of yellow deal or bass-wood 1 ft. 3 1/2 ins. or more in length, 4 1/4 ins. wide and 3/8 in. thick, will be required. Plane it up with jack and trying planes true on both sides, and on the face edge. Now set out the figures in pencil, and afterwards mark cut lines over the lead-pencil ones, using a straight-edge or the blade of a try-square for the inclined lines, and the marking gauge for the side of the square and hexagon parallel to the edge. The remaining sides of the square should be marked with chisel and try square. Saw out the various polygons with the tenon saw, keeping 1/32 in. from the line, and then plane all the edges down to the cut lines, with jack or trying plane, using the shooting board, as in fig. 123, p. 170. Take care not to plane against the grain in shooting the edges, as splitting at the corner farther from the operator will take place.

Plan.

Side elevation. Fig. 155.