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The sawing-in is done with a broad saw; the so-called "tenon saw" being the one most generally used.

Cut down each one, with the tenon saw, from k to x, and, with the chisel, pare down from j to k, first making it square and afterwards slightly rounding it, as shown in section of Fig.

With tenon saw make a nick at each of the four points g, in each case reaching to the outer of the semicircles, each nick being strictly at right angles.

Then, with the tenon saw, cut by the “shoulder” to a depth of 1⁄8 in., and pare the circle with the knife to the shoulder j, so making a round plug, a little too large to go into the holes of Fig.

Then, with tenon saw, cut down each line c d to the depth of the gauge line, and, with a small chisel, remove the whole of the pieces between the nicks made by the saw.