Carpentry for Boys / In a Simple Language, Including Chapters on Drawing, Laying Out Work, Designing and Architecture With 250 Original Illustrations

by James Slough Zerbe

Things to Avoid in Mortising.—You must be careful to refrain from undercutting as your chisel goes down at the lines a, b, because if you commit this error you will make a bad joint.

As much care should be exercised in producing the tenon, although the most common error is apt to occur in making the shoulder. This should be a trifle undercut.

Fig. 209.

See the lines (A, Fig. 209), which illustrate this.

Lap-and-Butt Joint.—The lap-and-butt is the form of uniting members which is most generally used to splice together timbers, where they join each other end to end.

Fig. 210.