Pennethorne, John; Robinson, John [Ill.]: The geometry and optics of ancient architecture: illustrated by examples from Thebes, Athens, and Rome (London [u.a.], 1878)

THE COLUMNS.

149

CHAPTER IV.

THE BASES.

The first given quantities with which to commence the design of the base of the Column are

the whole height, OR, and the whole projection, RP. (Fig. 1.)

Fig .1

R

0

Then this mass is broken into separate members, and is
generally composed of the following parts. (Fig. 2.)

apophpge,-----

-T--

Fig.

...........1

•>

JDD

coq

fillet,

■ — ¥"--

-*----

—V----









j





upper tome

I - -





\





fillet

—f-





IrwhilijLS

J







—«—







fewer tvrii.w ..

\







—sj*—



pliiitli



1st. The apophyge, or termination
of the shaft of the Column
by a curved outline.

2nd. The upper torus.

3rd. The trochilus.

4th. The lower torus:

5th. The plinth ; sometimes omitted

separated from

' each other by

fillets.

PLATE XI.
THE PROPORTIONS AND CURVES OF THE BASES OF THE COLUMNS.

The principles of design for the bases of the Columns are in all respects similar to those
for the capitals : the whole height and the projection divide into some given number of aliquot
parts, so as to have a common modulus, and this modulus will regulate all the details of the
base.

Yiq. 1.—The Base of the Ionic Column in the Nokth Poktico of the Erechtheium.

The given modulus of the Column in this example is 0224 feet. Let this be divided
into 6 aliquot parts, and the projection PR - 3 mod. = 3 x 6 - 18 parts ; the whole height
OR - 7 mod. == 7 x 6 = 42 parts.