be so divided that of
nine parts which it contains, the _Volute_ has the breadth of three
under the _Astragal_, on the top of the Pillar, which must be directly
upon the _Eye_ of the _Volute_, that which remains above the _Astragal_,
must be allowed for the _Abacus_, _Channel_, and the _Echine_ or _Egge_,
whose jetting beyond the Square of the _Abacus_ must be of the same
bigness of the _Echine_ or _Egge_.
The _Channel_ must be hollowed the 12th. part of its breadth.
The _Girdle_ or _Cincture_, or the lateral part of the _Capital_, ought
to advance out of the _Tailhoir Abacus_, as much as it is from the
Center of the _Eye_ to the height of the _Echine_.
The thickness of the _Axis_ of the _Volutes_, which is the thickness of
the _Volute_, seen sideway, and which makes up the extreme parts of that
which is called commonly _Balisters_, ought not to exceed the magnitude
of the _Eye_. See Tab. VIII.
These Proportions of the _Ionick Capital_, are only for Pillars of 15
Foot, those that are greater require other, and generally the greater
Proportions are required for the Pillars that are greater; and for this
reason we have said, that the higher the Pillars are, the less
Diminution they must have; so when the Pillars are above 15 Foot, we
must add a 9th. part to the Diameter of the Pillar for to give the
breadth to the _Abacus_; to which is never added more than an 18th. part
to Pillars of 15 Foot.
The _Architraves_ shall be laid upon the Pillars with Jettings equal to
the _Pedestals_, in case they be not all of one size, but in form of
Joint-Stools, to the end Symmetry may be observ'd.
The height ought to be different, according to the proportion of the
height of the Pillar; for if the Pillar be from 12 to 15 Foot, we must
allow the _Architrave_ the height of half a Diameter of the bottom of
the Pillar, if it be from 15 to 20, we must divide the height of the
Pillar into 15 parts, to the end we may allow one to the _Architrave_;
so if it be from 20 to 25, the height must be divided into 12 parts and
an half, that the _Architrave_ may have one; and so proportionably.
The _Architrave_ ought to have at the bottom which lies upon the
_Capital_, the same breadth that the top of the Pillar hath under the
_Capital_.
The Jetting of the _Cymatium_ of the _Architrave_ ought to answer the
bottom of the Pillar, the height of the _Cymatium_ ought to be the 7th.
part of the whole _Architrave_.
The rest being divided int
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