the module in accordance with which the adjustments are to be made
as above described.

8. Thus, over each portion of the architrave two metopes and two
triglyphs[3] will be placed; and, in addition, at the corners half a
triglyph and besides a space large enough for a half triglyph. At the
centre, vertically under the gable, there should be room for three
triglyphs and three metopes, in order that the centre intercolumniation,
by its greater width, may give ample room for people to enter the
temple, and may lend an imposing effect to the view of the statues of
the gods.

[Note 3: That is: two metopes with a triglyph between them, and half
of the triglyph on either side.]

9. The columns should be fluted with twenty flutes. If these are to be
left plane, only the twenty angles need be marked off. But if they are
to be channelled out, the contour of the channelling may be determined
thus: draw a square with sides equal in length to the breadth of the
fluting, and centre a pair of compasses in the middle of this square.
Then describe a circle with a circumference touching the angles of the
square, and let the channellings have the contour of the segment formed
by the circumference and the side of the square. The fluting of the
Doric column will thus be finished in the style appropriate to it.

10. With regard to the enlargement to be made in the column at its
middle, let the description given for Ionic columns in the third book be
applied here also in the case of Doric.

Since the external appearance of the Corinthian, Doric, and Ionic
proportions has now been described, it is necessary next to explain the
arrangements of the cella and the pronaos.

CHAPTER IV

THE CELLA AND PRONAOS

1. The length of a temple is adjusted so that its width may be half its
length, and the actual cella one fourth greater in length than in width,
including the wall in which the folding doors are placed. Let the
remaining three parts, constituting the pronaos, extend to the antae
terminating the walls, which antae ought to be of the same thickness as
the columns. If the temple is to be more than twenty feet in width, let
two columns be placed between the two antae, to separate the pteroma
from the pronaos. The three intercolumniations between the antae and the
columns should be closed by low walls made of marble or of joiner's
work, with doors in them to afford passages into the pronaos.

2. If the width is to be more than