shelf is housed into the end, and the tenons run
through the end and are secured by wedges. This allows the article to be
quickly and easily taken to pieces for removal or re-polishing. The
dotted line in Fig. 155 indicates that the shelf may be shaped if
desired.

[Illustration: Fig. 154.--Another Type of Tusk Tenon.]

[Illustration: Fig. 155.--Tusk Tenon and Wedge.]

[Illustration: Fig. 156.--Wheelwright's Self-wedging Tenon Joint.]

In Fig. 156 a self-wedging mortise and tenon joint used by wheelwrights
is shown. The dotted line (left-hand diagram) will indicate the amount of
taper given to the mortise.

DOVETAILED AND WEDGED TENON (Fig. 157).--When two pieces such as the
cross rail and leg of a carpenter's bench are required to be held
together by a mortise and tenon, and to be readily taken apart, the tenon
is dovetailed on one side and the mortise is made of sufficient width to
permit the widest part of the dovetailed tenon to pass into it. When the
tenon is in its position a hardwood wedge is driven in above the tenon,
as shown.

[Illustration: Fig. 157.--Dovetailed and Wedged Tenon.]

[Illustration: Fig. 158.--Method of Fox-wedging.]

FOX WEDGED TENON (Fig. 158).--This is the method of securing a stub tenon
by small wedges. The mortise is slightly dovetailed and two saw cuts are
made in the tenon about 3/16 in. from each side. Into each saw kerf a
wedge is inserted and the joint glued up. The cramping operation forces
the wedges into the saw cuts, thus causing the end of the tenon to spread
and tightly grip the mortise.

MORTISE AND TENON WITH MITRED FACE (Fig. 159).--This is a useful method
of jointing framing which has square edges as shown; and it is equally
useful even if the face edges have moulds worked upon them. If the joint
has square edges a rebate may be formed to accommodate a panel by fixing
a bolection moulding around the frame. A section of the bolection mould
planted on the frame is shown in the lower figure.

[Illustration: Fig. 159.--Tenon Joint with Mitred Face.]

[Illustration: Fig. 160.--Rafter Joint.]

[Illustration: Fig. 161.--Roof Joints.]

ROOF JOINTS.--Fig. 160 shows the method of tenoning the principal rafter
to the king post, whilst Fig. 161 illustrates the tenoning of the struts
to the king post, and the king post to the tie beam. Both these examples
are used in roof work. (See also Fig. 71.)

[Illustration: Fig. 162.--Drawbore Pinning.]

[Illustration: Fig. 163., F