From the intersection of the
radial line _A b_ with the arc _a_ we draw the line _h h_ at right
angles to _A b_. Where the line _h_ intersects the radial lines _A B'_
is located the center of the pallet staff, as shown at _B_. Inasmuch as
we decided to let the pallet utilize five degrees of escape-wheel
action, we take a space of two and a half degrees in the dividers, and
on the arc _a a_ lay off the said two and a half degrees to the left of
this intersection, and through the point so established draw the radial
line _A g_. From _B_ as a center we sweep the arc _d d_ so it passes
through the point of intersection of the arc _a_ with the line _A g_.
[Illustration: Fig. 20]
We again lay off two and a half degrees from the intersection of the
line _A b_ with the arc _a_, but this time to the right of said
intersection, and through the point so established, and from _B_ as a
center, we sweep the arc _e_. From the intersection of the radial line
_A g_ with the arc _a_ we lay off to the left five and a half degrees on
said arc, and through the point so established draw the radial line _A f_.
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