Gabb, Thomas: Finis pyramidis or Disquisitions concerning the antiquity and scientific end of the great pyramid of Giza, or ancient Memphis, in Egypt, and of the first standard of linear measure (Retford, 1806)

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to which the erroneous modern designs of this base
are exposed. And the same is to be observed as to the
attic base.

SECT. VI.

Ofthe symmetrical height of shafts.

NOTHING is better understood, nor more inva»
riably observed in practice, than the symmetrical intire
height of bases of columns : at the same time, nothing,
in Vitruvius, is less comprehended than the symmetrical
heights of shafts of columns, the Tuscan excepted ; I
say the shafts, because the heights of bases and capitals
not being liable to variation, the shafts are the proper
subject of the following disquisition.

The symmetrical heights of the shafts of Grecian
columns depend on circumstances; as, the various kinds
of intercolumns and difference of situation ; when
exposed to the full glare of light, or removed into
places where, only a modified degree of light can en-
compass them : and, for distinction sake, the former
shall be denominated external columns, the latter in-
ternal. The symmetrical altitude, however, is to be
conceived, in the first instance, as applicable to external
columns, and that, subject to a variation, according to
Vitruvius, from the species of intercolumns, of which
there are five. The areostyle understood to mean more
then 3 diameters between the under parts of the shafts
of columns. The diastyle, nearly 3 diameters, but not
to exceed 3., The systyle, not to exceed 2 diameters.
The pycnostyle not more than li diameter. And the
eustyle settled by Hermogeaes, the i η ventor of it, at,

exactly,