Rudiments of ancient architecture, containing an historical account of the five orders, with their proportions, and examples of each from antiques also, extracts from Vitruvius, Pliny, &c. relative to the buildings of the ancients — London, 1810 (4. Aufl.)

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126 PYC ROO

Pycnostyle, according to Vitruvius, the
first method of intercolumniation, ha-
ving one diameter and a half between
each column.

Pyramid, a structure, which, from a
square, triangular, or other base, rises
gradually to a point.

Q.

Quarter Round, a moulding. See

Ovolo.
Quoins, stones or other materials put in

the angles of buildings to strengthen

them.

R.

Relievo, signifies the proportion of any
carved ornament.

Roman order, the same as the Composite.

Roof, the roofs of the ancients, according
to Vitruvius, consisted of the following
parts: Trabes, a beam, or wall plate;
being the timber which is laid upon the
walls, columns, &c. to receive and dis-
tribute the pressure of the roof. Cul-
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