Guevara, Giovanni di - In Aristotelis mechanicas commentarii

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DE COCHLEA.

Cochlea inſtrumentum eſt veluti com
poſitum ex cuneo, & cylindro, ſeu eſt ſtria
tus quidam cylindrus ſtrigas habens admo
dum helicis ſpirulatim circumuolutas, cuius
vertigine pondera helici

18[Figure 18]
congruè applicata, facillimè mouentur.
Exemplum ſit erectus cylindrus AB,
cuius helices, vel ſtrigæ circumuolutæ,
ſint CD, EF; manubrium verò cylin
dri G. Etenim ſi in principio helicis
vbi C, onus congruè applicetur, vt
pila ſuperſignata H; ita tamen vt ex
aduerſo non poſſit moueri, niſi ſuper
rectam IK, quaſi intercepta inter cy
lindrum & planum quoddam paralle
lum cylindro; abſque dubio, ad cir
cumuolutionem manubrij totiuſque
cylindri, pondus H paulatim aſcendet
ex C ad D, deinde ad E & F, & ſic
deinceps.

Idemque poteſt exemplificari in.
alia ipſius cochleæ figura æquidiſtantis
ab horizonte, vt AB, ſi apponatur
illi onus CD, tanquam cylindri con
caui ac ſtriati, qui & Tylum à Pappo, & alijs Mechanicis,

19[Figure 19]

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