Third. Square all the lines around four sides.
Fourth. Saw to end lines and block-plane ends.
Fifth. Lay off width of opening in piece No. 1 and square lines across face and halfway down on both edges.
Sixth. Measure length of lap on No. 2, square the line across bottom and halfway up the sides. Gauge the horizontal lines ll from working face.
Seventh. Saw pieces No. 1 and No. 2 apart and block-plane ends.
Eighth. Saw to the lines, chisel, and fit the pieces.
Although the above is the method of laying out a typical joint, each problem will require special treatment and here the student will be guided by his instructor.
24. Securing Parts. Many articles made of wood consist of several pieces fastened together.
When two pieces are fitted together the surfaces of contact are called a joint. There are many kinds and shapes in joinery, and usually some extra fastening is required to hold the pieces together. These aids are glue, nails, and screws; while on heavy construction still others, such as wedges, pins, and dowels are used. The first three are commonly used in small work.