91, p.

66.
In cutting the tenon, first rip-saw just outside the gaged lines, then crosscut at the shoulder lines.

Do all the rip-sawing before the crosscutting.

If the pieces are small the back-saw may be used for all cuts.

It is well to chamfer the arrises at the end of the tenon to insure its starting easily into the mortise.
Locate the ends of the mortise and square lines across with a sharp pencil in order to avoid leaving knife marks on the finished piece.
Then locate the sides of the mortise from the thickness of the tenon, already determined, and gage between the cross lines.