Monantheuil, Henri de, Aristotelis Mechanica, 1599

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1rectam. Radius deſcribens circulum duabus ſuis lationibus, non
fertur
ſecundum rectam.
Radij igitur lationes in nulla ſunt ra­
tione
.
Propoſitio confirmatur cum ſequenti diagrammate.
Eſto rectangulum a b h g com­
10[Figure 10]
prehenſum ſub rectis a b, a g,
quæ ſint inter ſe in ratione, quam
duæ
lationes ipſius a habent.
Et intelligatur a latum verſus
b perueniſſe ad d, & verſus
g perueniſſe ad e: ſicque cum
lationum
ipſius a ratio ſit vt
a b ad a g, ergo erit & a d
ad a e: vt a b ad a y, & rectrangulum minus a d z e com­
munem
angulum a cum maiori a b h g habens & ſimile erit
def
. 1. lib. 6. & proinde circa eandem dimentientem conuerſ. prop.
24
. lib. 6.
Et ſic a duabus ſuis ſic lationibus latum erit in z, vt vbi­
cumque
lationes ipſius a ſiſtentur, ſemper ſint ſupra diametrum
a h. ſiquidem lationes iſtæ ſunt in ratione a b ad a g. proinde
ſupra
rectam, quia omnis diameter rectanguli recta eſt.
Huic con­
ſentit
quod à Proclo ex Gemino acceptum ſic expoſitum eſt.
Si qua­
drangulum
duoſque motus qui æquali celeritate fiant, alterum qui­
dem
per longitudinem: alterum vero per latitudinem intellexeris
dimetiens
producetur recta exiſtens linea, lib. 2. comm. in def. rectæ
lineæ
.
Nunc igitur ponatur a extremum radij duabus lationibus
deſcribere
circulum non digrediens à recta producere rectam, quod
eſt
contra naturam circuli.
Non igitur duæ lationes ipſius a ferun­
tur
in ratione a b ad a g. Sed hîc obiici poteſt quod Sol motu pri­
mi
mobilis mouetur ab Oriente in Occidentem in 24. horis, & motu
proprio
ab Occidente in Orientem in aliquo tempore quantum eſt
quod
reſpondet æquatori coaſcendenti cum 59'. 8". Eclypticæ.
Et ſic
eius
duæ lationes ſunt in ratione aliqua, nec tamen Sol fertur ſecun­
dum
rectam ſed ſecundum arcum Eclypticæ.
Ita eſt, ob id dicendum hic
dictas
ab Ariſtotele duæ lationes non ſimpliciter intelligendas: ſed ta­
les
, quæ ferantur ambæ ſecundum rectam.
Et ſit manebit demonſtratio.

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