317) is used.

[Illustration: Fig. 319.--Showing Method of Paring.]

[Illustration: Fig. 320.--Channelling the Alternate Piece.]

With regard to cutting the alternate piece, it is necessary to first
plane the end of the shelf true and square. With a cutting gauge strike
the line K, Fig. 320; the required bevel on the edge (J) is then set out,
and with the chisel a small channel is again formed. With the tenon or
dovetail saw cut down the line K to the required depth, and carefully
pare away the wood with a sharp chisel to the correct shape.

THE MITRED JOINT

Although mitreing is used in everyday woodwork, it comes last in our list
of regular joints simply because it has been partly dealt with in almost
every previous chapter. For example, we have mitre halving in Fig. 34, a
mitre bridle joint in Fig. 74, a tongued and grooved mitre in Fig. 116,
mitred mortise and tenon joints in Figs. 148 and 159, a dowelled mitre
frame in Fig. 202, and a mitred dovetail in Fig. 286.

[Illustration: Fig. 321.--Mitred Skirting.]

[Illustration: Fig. 322.--Curved Mitre.]

[Illustration: Fig. 323.--Halving the Angle.]

MITREING.--The term mitreing is generally used to denote the type of
joint used at the corner of a picture frame; or where two pieces of wood
are bevelled away so as to fit each other, as the skirting or plinth
mould at Fig. 321. In these cases the timber is cut so that the joint is
at 45 degrees to the face, and the two pieces, when placed together,
form an angle of 90 degrees (a right angle).

The term mitreing, however, is not confined to the fitting of timber
around a right angle; it may be justly applied to the fitting of a
moulding around an angle irrespective of the number of its degrees.

One often hears such terms as "a half mitre," used to denote the fitting
of a moulding around an octagonal column or pedestal, and probably it
would be more correct to describe the joint as a mitre cut at 22-1/2
degrees. Mitreing consists of halving the angle and making each piece to
fit the line of bisection. Should the angle be bounded by straight lines,
as at Fig. 321, then the mitred joint will be a straight line, but should
the angle be bounded by a curved and a straight line, as at Fig. 322, A,
or by two curved lines, then the mitred joint will have to be a curved
line if the mouldings are to be of the same section.

[Illustration: Fig. 324.--Sawing Block for Mitreing.]

FINDING THE ANGLE.--For straight