DOI Page / Citation link:
https://doi.org/10.11588/diglit.8#0196
{ 195 )
In concluding this discussion, for the convenience
©f the practitioner, I shall subjoin Vitruvius's divisions
reduced into minutes, that the several symmetries of
heights and projectures, may be seen and compared.
The height of the great torus, 84• minutes: the
Upper scotia with it's astragals and supercilium, 5f mi-
nutes: the height of the astragals, about \ a minute
each: the height of the under scotia, 5f minutes: the.
height of the plinth, 10 minutes. But it must be ob-
served, that, 1 minute for the supercilium, and 1 for the
two astragals, deducted from the height of the upper
scotia, the curve of it Will be Only 3f minutes high.
Projectures, of the great torus at top, 41J minutes: the
fdlet, called supercilium, projects equal with the torus:
the two astragals also the same : the plynth, 45 minutes.
I have before observed that when the plynth projects to
this extent, the apophyge should, or, at least may, be
considerably larger, than it can be when the plynth
projects less» And as the centre, on which is scribed
the Semicircle of this great torus, is about 37 minutes
from the central line, Ì conceive, the radius of the quar-
ter circle of thé apophyge should be about 6 minutes,
then will the fillet, 1 minute high, project 36 minutes:
and the curve Of the upper scotia should be drawn so
far inwards, as to have between it's convex extremity
and the central line, the distance of 37 minutesi and
the under scotia the samé. Thus will be completed a
strong and sightly base. And by thus projecting the
supercilium, as seen in the bases designed by Cossutiue
for the Olympian, imitated, no doubt, by Vitruviüs, the
whole profile may be drawn nearer to the central line,
by those, who dislike the projecture of 45 minutes in
the plinth, without incurring any of those absurdities,
£h to
In concluding this discussion, for the convenience
©f the practitioner, I shall subjoin Vitruvius's divisions
reduced into minutes, that the several symmetries of
heights and projectures, may be seen and compared.
The height of the great torus, 84• minutes: the
Upper scotia with it's astragals and supercilium, 5f mi-
nutes: the height of the astragals, about \ a minute
each: the height of the under scotia, 5f minutes: the.
height of the plinth, 10 minutes. But it must be ob-
served, that, 1 minute for the supercilium, and 1 for the
two astragals, deducted from the height of the upper
scotia, the curve of it Will be Only 3f minutes high.
Projectures, of the great torus at top, 41J minutes: the
fdlet, called supercilium, projects equal with the torus:
the two astragals also the same : the plynth, 45 minutes.
I have before observed that when the plynth projects to
this extent, the apophyge should, or, at least may, be
considerably larger, than it can be when the plynth
projects less» And as the centre, on which is scribed
the Semicircle of this great torus, is about 37 minutes
from the central line, Ì conceive, the radius of the quar-
ter circle of thé apophyge should be about 6 minutes,
then will the fillet, 1 minute high, project 36 minutes:
and the curve Of the upper scotia should be drawn so
far inwards, as to have between it's convex extremity
and the central line, the distance of 37 minutesi and
the under scotia the samé. Thus will be completed a
strong and sightly base. And by thus projecting the
supercilium, as seen in the bases designed by Cossutiue
for the Olympian, imitated, no doubt, by Vitruviüs, the
whole profile may be drawn nearer to the central line,
by those, who dislike the projecture of 45 minutes in
the plinth, without incurring any of those absurdities,
£h to