Guevara, Giovanni di, In Aristotelis mechanicas commentarii, 1627

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1
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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