f _Vitruvius_, were built at _Rome_,
_Constantinople_, and many other places. The _Modern_, is that which
being more accommodated to the present use, or for other Reasons, has
changed some of the Dispositions and Proportions which were observed by
the _Ancient_ and _Antique_ Architects.

ART. II.

_The Method of the Works of_ Vitruvius, _with short
Arguments of every Book._

[Sidenote: _Lib. 1. Chap. 3._]

All his Works are divided into Three Parts: The First Treats of
Building; The Second is Gnomonical, and treats at large of Astronomical
and Geometrical Affairs. The Third gives Rules and Examples for making
Machines or Engines serviceable, either in War or Building. The First
Part is treated of in the Eight first Books: The Second in the Ninth:
The Third in the Last.

The First Part which relates to Building is twofold, for they are either
publick or private. He speaks of private Buildings in the Sixth Book;
and as to that which relates to publick Buildings, it's likewise divided
into Three Parts, _viz._ That which has Relation to Security, which
consists in Fortifications, described in the Third Chapter of the First
Book; That which appertains to Religion, of which he treats in the Third
and Fourth Books, and that which relates to publick Conveniencies, as
_Town-Houses_, _Theatres_, _Baths_, _Academies_, _Market-places_,
_Gates_; of which he treats in the Fifth Book.

The Gnomonical part is treated of in the Ninth Book.

The Third Part which treats of Machines, is treated of in the Tenth and
Last Book.

Besides these particular Matters of Architecture, there are Three things
that appertain to all sort of Edifices, which are, Solidity,
Convenience, and Beauty. He speaks of Solidity in the Eleventh Chapter
of the Sixth Book; of Convenience, in the Seventh Chapter of the same
Book; and of Beauty through the whole Chapter of the Seventh Book; which
contains all the Ornaments that Painting and Sculpture are capable of
giving to all sorts of Fabricks; and as to Proportion, which ought to be
esteemed one of the principal Foundations of Beauty, it's treated of
throughout all his Works.

But to make it better understood, in what Method every Book explains
those things, we must tell you, That in the First Book, after having
treated of those things that belong to Architecture in General, by the
Enumeration of the Parts that compose it, and of those that are required
in an Architect, the Author explains in p