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)

f 2S6 >

the shaft less, as in that case the prefecture of the lower
fascia is, sometimes, according to Vitruvius, 26 or even
27 minutes.

Now, although the principle of optics, on which
Yitruvius founded this rule, is denied, the document;
itself is perfectly intelligible ; and, by it, we know the
mmd of Vitruvius was to allow about one minute to the
sally of each fascia. His rule, then, that elevated objects
must stoop, in order to appear erect, being discarded,
and the incidental effect only, attended to ; his symme*
tries for these projectures, are, the lower fascia 25 mh>
utes ; the middle fascia 26 ; the upper fascia 27, and
their fronts or faces perpendicular ; then the projectute
of the cymatium 32|s the freezes 25; it's cymatium
31| : the sally of the denticules, Vitruvius orders to be
equal to their height, which, inclusive of the cymatium,
is 11 minutes ; and the height of the cymatium £• of
that=;l£ ; (but to a^oid this fraction it may as well be
2 minutes ;) then, without the cymatium, the height of
the denticules will he 9 minutes; and the projecture4pf;
the projecture of it's cymatium 42f: the corona with the
sally and cymatium, the same as the denticules ; projec-
ture of it's face 51 J; it's cymatium 53f : lastly, the Sima,
being 12§ high, will project, at it's orlo or square, 66|.
And the intire cornice, including the cymatium of the
freeze, will have it's sally from the face of the freeze,
exactly equal to the height, (including also the cymatium
of the freeze,) as well as each member had respectively.
Which is what Vitruvius expressly orders foT this Ionic

Entablature.

But the Corinthian cornice, by the admission of

modulions in the soffit of the corona, will not exactly
assimilate it's height to it's sally, even in the moderate

height