the whole, according to the measure of any
Part. For as in Humane Bodies there is a Relation between the Foot,
Hand, Finger and other Parts; so amongst Works that are Perfect, from
any particular Part, we may make a certain Judgment of the Greatness of
the whole Work: For Example, the Diameter of a Pillar, or the Length of
a _Triglyph_, creates in us a right Judgment of the Greatness of the
whole Temple.

And here we must remark, that to express the Relation that many things
have one to another, as to their Greatness or different Number of Parts,
_Vitruvius_ indifferently makes use of three words, which are
_Proportion_, _Eurythmy_ and _Symmetry_. But we have thought it proper
only to make use of the word Proportion, because _Eurythmy_ is a Greek
word, which signifies nothing else but Proportion; and Symmetry,
although a word commonly used, does not signifie in the Vulgar Languages
what _Vitruvius_ understands by Proportion; for he understands by
Proportion, a Relation according to Reason; and Symmetry, in the vulgar
Languages, signifies only, a Relation of Parity and Equality. For the
word _Simmetria_ signifies in Latin and Greek _Relation_ only. As for
Example, as the Relation that Windows of Eight Foot high, have with
other Windows of Six Foot, when the one are Four Foot broad, and the
other Three: and Symmetry, in the Vulgar Languages, signifies the
Relation, for Example, That Windows have one to another, when they are
all of an equal height and equal breadth; and that their Number and
Distances are equal to the Right and the Left; so that if the distances
be unequal of one side, the like inequality is to be found in the other.

Decorum or Decency, is that which makes the Aspect of the Fabrick so
correct, that there is nothing that is not approv'd of, and founded upon
some Authority. It teaches us to have regard to three things, which are,
_Design_, _Custom_ and _Nature_.

The Regard to Design makes us chuse for Example, other Dispositions and
Propertions for a Palace than for a Church.

The Respect we have to Custom, is the Reason, for Example, That the
Porches and Entries of Houses are adorned, when the Inner Parts are Rich
and Magnificent.

The Regard we have to the Nature of Places, makes us chuse different
Prospects for different Parts of the Fabrick, to make them the wholsomer
and the more convenient: For Example, the Bed-Chambers and the Libraries
are exposed to the Morning Sun; the Winter Apartments, to