Dia. XII represents the same as the foregoing in a three-fourths circle,
but on a square of 17½, also the equilateral triangle of 35 numbers. Each
of the Dia. XI and XII are one square cut from the center of a circle,
and in order to make it as simple as possible the vest is again used.
The bottom of the forepart is on the circle, but that would make a short
vest, and for this reason the back shows 1½ longer.
[Illustration: _Dia. 12._]
DIA. XIIa.
Dia. XIIa is made to illustrate all points obtained from the center of a
circle, or from a point of the angle of 135 deg. All it requires is to
lengthen the lines, so that they are long enough for the full scale. Any
other point in any other garment may be found in the same way.
[Illustration: _Dia. XIIa._]