rs must be set upon their _Bases_ two ways; for sometimes they
were perpendicularly set, and sometimes not, _viz._ The outward rows of
Pillars; when there were more Ranks than one; for that part of the
Pillar which is towards the Wall of the Fabrick must necessarily be
perpendicular, and the outward part must have all the Diminution, and
must lean towards the Wall.

[Sidenote: _Lib. 3. Chap. 3._]

The Pillars that are within the porch, and are betwixt the Wall and the
outward Pillar must stand perpendicularly.

The breadth of the _Ionick Base_ is the Diameter of the Pillar, to which
is added a 4th. and an 8th. part; its height is half the Diameter; its
height being divided into three parts, one is allowed for the
_Plinthus_, the rest being divided into seven parts, three are allowed
to the _Torus_ above, after equally dividing the four which remain, the
two above are for the upper _Scotia_, with its _Astragal_: The two below
are for the lower _Scotia_, which will appear greater than the upper,
because it extends to the edge of the _Plinthus_, the _Astragals_ must
have the 8th. part of the _Scotia_, whose Jetting or Projecture must be
the 8th. part of the whole _Base_ joyned to the 6th. part of the
Diameter of the Pillar. See Tab. VII.

As to the _Capital_, the _Abacus_ must have in its Square the Diameter
of the bottom of the Pillar, adding to it an 18th. part; half of the
_Abacus_ ought to be the height of the _Capital_, comprizing the Round
of the _Volute_ or _Scroll_, but there must be substracted from the
corner of the _Abacus_ a 12th. part and an half of the height of the
_Capital_, and after the whole thickness of the _Capital_ must be
divided into nine parts and an half, and one and an half must be left
for the thickness of the _Abacus_, that the _Volutes_ or _Scrolls_ may
be made of the eight which remain; then having left under the _Abacus_
four parts and an half of these eight, a Line must be drawn in the place
which cuts the two a-cross and the Points of the Section shall be
_Eyes_, which shall have eight parts for their Diameter; in half the
space of the _Eye_ shall be placed the Centers through which shall be
drawn with a Compass the Spiral-Line of the _Volute_, beginning the
height under the _Abacus_, and going into the four Quarters of the
Division, diminishing till we come directly to the first Quarter, and
giving to every Quarter a particular Center.

Then the thickness of the whole _Capital_ must