Fig. 2762.
The mortice gauge, [Fig. 2762], is similar to the above as regards the stem and sliding piece, but it is provided with two marking points, their distance apart being adjustable. The head screw works in brass nuts.
Fig. 2763.
For lines that are to be marked more than about ten inches from the edge of the work a broader base is necessary to the head or block, which may be shaped as shown in [Fig. 2763].
Fig. 2764.