66, saw accurately to the gaged lines, and chisel out the waste as in a dado, see Figs.

70 and 71, p.

56.
The bottom of the dado thus cut should be flat so as to afford surface for gluing.

When well made, a cross-lap joint does not need to be pounded together but will fit tight under pressure of the hands.
_No.15.A middle-lap joint or halved tee_, Fig.

265, is made in the same way as a cross-lap joint, but one member projects from the joint in only one direction, it is used to join stretchers to rails as in floor timbers.
_No.16.An end-lap joint_, Fig.