The Length Of The Mortises
Then take a small try square (Fig. 28) and add two cross lines (B, C) on each of the inner surfaces, the second line (B) one-half inch from the finish line (A), and the other line (C) seven inches down from the line (A). The side facing boards, hereafter described, are seven inches wide.
When this has been done for all the legs, prepare your gage (Fig. 29) to make the mortise scribe, and, for convenience in illustrating, the leg is reversed. If the facing boards are 1" thick, and the tenons are intended to be ½" thick, the first scribe line (E) should be ½" from the work side, because the shoulder on the facing board projects out ¼", and the outer surface of the facing board should not be flush with the outer surface of the leg. The second gage line (F) should be 1" from the work side.
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