Vitruvius, De architectura libri decem, 1567

Table of handwritten notes

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148116LIBER
Aſtragalus ſub oculo ſuos habet terminos; ideo dicit Vitr. tres partes præpendere debere infra aſtr agalum,
5353[Handwritten note 53]5454[Handwritten note 54]5555[Handwritten note 55]5656[Handwritten note 56]5858[Handwritten note 58]5959[Handwritten note 59]6060[Handwritten note 60] nam infra oculum ad extremam uolutæ circinationem, tres ſunt partes ex nouem &
dimidia, in qua cathetos
diuiſa
erat.
Cumigitur tres partes ſint infra oculum, ubi aſtragalus terminatur, ſex & dimidia erunt reliquæ,
ex
his una &
dimidia datur abaco. restant igitur quinque. ex his unam, & dimidiam canalis occupat, cy-
matium
duas, &
quartam, latitudo uolutæ dimidiam. reliquum igitur astragalus occupabit, hoc eſt tres quar
tas
, quæ ſimul poſitæ reddunt nouem, &
dimidiam. Est autem cymatium ubi x. dicit igitur adempto abaco,
id
eſt iam detracto, quia unam, &
dimidiam partem occupabat, cymatio, & canali reliqua ſit pars. Canalis
excauetur
parte, duodecima altitudinis uolutæ.
Aſtragalicentrum & in catheto; ducitur autem uoluta mol
5353[Handwritten note 53]5454[Handwritten note 54]5555[Handwritten note 55]5656[Handwritten note 56]5858[Handwritten note 58]5959[Handwritten note 59]6060[Handwritten note 60] liter ſupra cymatium, ut dixi.
Sub Aſtragalo eſt quadra apophygis, cuius proiectura extra cathetum non pro
ducitur
.
alta eſt dimidia aſtragali craßitudine.
1110
Vitruuius ſupra ab extremitatibus abaci, cathetos dimitti iuſſerat, ut nobis oſtenderet cymatij proiectu-
ram
, nam cum dicit hoc loco cymatij proiecturam habere extra abaci quadram oculi magnitudinem dimitten-
do
illas lineas, terminos nobis oſtendit, a quibus proiectura cymatij produceretur.
Cymatij flexus, circino per-
5353[Handwritten note 53]5454[Handwritten note 54]5555[Handwritten note 55]5656[Handwritten note 56]5858[Handwritten note 58]5959[Handwritten note 59]6060[Handwritten note 60] ficitur, hoc modo.
collocatur circini pes in catbeto, in quo eſt uolutæ oculus, ubi canalis ſuperior terminus eſt,
uerbi
gratia in puncto x, &
diducitur ad extremam proiecturam cymatij, ubi 2. & duciditur flexus ad infe-
riorem
partem ad extremam aſtragalum, ita ut circuli quadrans perficiatur.
2220
A lateribus tumor puluinorum cernitur, in medio ſunt balthei, qui extra abacum prominere debent, ratio
5353[Handwritten note 53]5454[Handwritten note 54]5555[Handwritten note 55]5656[Handwritten note 56]5858[Handwritten note 58]5959[Handwritten note 59]6060[Handwritten note 60] autem eorum proiecturæ ſumitur hoc modo, ut poſito circino in medio tetrante capituli in puncto, &
, & didu-
cto
ad extremitatem cymatij, circinationis liea baltheos, &
zonas, uel cingula puluinorum contingat. ubi R.
5757[Handwritten note 57]
Capitulum debet altitudini columnæ reſpondere. Cum igitur altior una ſit altera, oportebit rationem muta-
5353[Handwritten note 53]5454[Handwritten note 54]5555[Handwritten note 55]5656[Handwritten note 56]5858[Handwritten note 58]5959[Handwritten note 59]6060[Handwritten note 60] re, quapropter Vitr.
capitulum earum columnarum, quæ ſunt ab minimo altæ quindecim pedes, deſcripſit. ſed
ſi
altior columna fuerit ad eundem modum certe ſymmetrias habebunt.
Sed abacus ultra columnæ craſſitudi-
nem
nona parte prominebit, nam cum columna maior ſit, minus contrahitur, aer enim ob distantiam contrahe-
4440 re uidetur.
Concludit autem Vitr.
De uolutarum deſcriptionibus uti ad circinum ſint rectè inuolutæ, quemadmodum deſcribatur,
5353[Handwritten note 53]5454[Handwritten note 54]5555[Handwritten note 55]5656[Handwritten note 56]5858[Handwritten note 58]5959[Handwritten note 59]6060[Handwritten note 60] in extremo libro forma, &
ratio earum erit ſubſcripta. Capitulis perſectis, deinde in ſummis colum-
narum
ſcapis, non ad libellam ſed ad æ qualem modulum collocatis, uti quæ adiectio in ſtyloba-
tis
facta fuerit, in ſuperioribus membris reſpondeat ſymmetria epiſtyliorum.

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