nd a template made of cardboard, sheet zinc, or
veneer, should be made to this shape. At the left-hand side the
geometrical setting out is shown for obtaining the curve without having
to resort to drawing it freehand.

Take half the width of the moulding, as shown by dotted line A, and where
it cuts the approximation of the curved mitre place the point of the
compasses and strike out a circle as shown; with the same radius place
the compass point on B--that is, the inside point of the mitre, and cut
the circle on the right and left with the small arcs shown at _aa_. With
the same radius put the compass point at the junction of the circle and
mitre line, C V, and cut the circle at right and left, viz., _ee_.

[Illustration: Fig. 333.--Template for Mitreing.]

Now rule a line through _aa_, and another line through _ee_, and where
these lines cut each other it will give the correct radius of the curved
mitre. The advantage of knowing the correct radius of a curved mitre is
of great benefit to the skilled machinist, as it enables him to set up
his machine so as to give a definite result.

MITREING A MOULDED DOOR FRAME.--Fig. 333 illustrates the method of
mitreing the moulded portion of a door frame where the joint is dowelled,
not tenoned. A small wooden template is made out of beech or other
hardwood, having its ends cut at 45 degrees. This template is placed on
the rail, as shown, and held in position by placing both the rail and the
template in the vice. The face of the template forms a guide for a wide
chisel, and enables the worker to gradually pare away the moulding to the
correct angle.

[Illustration: Fig. 334.--Using Panel Saw in Mitre Box.]

For sawing the mitres on large mouldings such as are used on the lid of a
gramophone or wireless cabinet, a mitre sawing box and a panel saw may be
used as indicated at Fig. 334.

JOINTS FOR CURVED WORK

Fig. 335 shows a circular frame made up in two thicknesses, the segments
being screwed to each other and the joints crossed in two layers. This is
a very strong method, and it is used for making circular frames and curbs
up to 15 ft. in diameter. The segments can be either long or short, the
only important condition being that they must be marked out and sawn to
the correct radius. Fig. 337 shows a board marked out in segments for
this class of work. The longer the boards the better will they cut up, as
it gives more opportunities of cutting one piece out of th