ion we first file away about two-fifths of _F_ and
then grind the flat side on a glass slab to a flat, even surface and, of
course, equal thickness from end to end. We reproduce the sleeve _G_ as
shown at Fig. 113 as if seen from the left and in the direction of the
axis of the bar _F_. To prevent the bar _F_ turning on its axis, we
insert in the sleeve _G_ a piece of wire of the same size as _F_ but
with three-fifths cut away, as shown at _y_, Fig. 121. This piece _y_ is
soldered in the sleeve _G_ so its flat face stands vertical. To give
service and efficiency to the screw _h_, we thicken the side of the
sleeve _F_ by adding the stud _w_, through which the screw _h_ works. A
soft metal plug goes between the screw _h_ and the bar _F_, to prevent
_F_ being cut up and marred. It will be seen that we can place the top
plate of a full-plate movement in the device shown at Fig. 109 and set
the vertical centers _I_ so the cone points _n_ will rest in the pivot
holes of the escape wheel and pallets. It is to be understood that the
lower side of the top plate is placed uppermost in the movement holder.

[Illustration: Fig. 121]

If we now reverse the ends of the centers _I_ and let the pivots of the
escape wheel and pallet staff rest in the hollow cones of these centers
_I_, we have the escape wheel and pallets in precisely the same position
and relation to each other as if the lower plate was in position. It is
further to be supposed that the balance is in place and the cock screwed
down, although the presence of the balance is not absolutely necessary
if the banking screws are set as directed, that is, so the jewel pin
will just freely pass in and out of the fork.

HOW TO SET PALLET STONES.

We have now come to setting or manipulating the pallet stones so they
will act in exact conjunction with the fork and roller. To do this we
need to have the shellac which holds the pallet stones heated enough to
make it plastic. The usual way is to heat a piece of metal and place it
in close proximity to the pallets, or to heat a pair of pliers and clamp
the pallet arms to soften the cement.

Of course, it is understood that the movement holder cannot be moved
about while the stones are being manipulated. The better way is to set
the movement holder on a rather heavy plate of glass or metal, so that
the holder will not jostle about; then set the lamp so it will do its
duty, and after a little practice the setting of a pair of palle