Then mark and gage the width of the tenon in the same way.

Whenever there are several tenons of the same size to be cut, they should all be laid out together, that is the marking-gage set once to mark all face cheeks and once to mark all back cheeks.

If a mortise-gage is available, use that.

Always mark from the working face or working edge.

Cut out a triangular groove on the waste side of the knife lines (at the shoulders) as in cutting a dado, Fig.