Guevara, Giovanni di
,
In Aristotelis mechanicas commentarii
,
1627
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rem autem ſemper eam quæ præter naturam eſt ipſa minor
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fertur: quia enim centro eſt vicinior quod trahit, vincitur
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magis.
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<
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">COMMENTARIVS.</
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<
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">Qvamuis Philoſophus ſuperiori textu ſemel atque
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iterum aſſumpſerit, ſemidiametrum, ſeu lineam
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circulum deſcribentem, duabus ferri lationibus,
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prout explicuimus; huc tamen illud probandum
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reliquit, & ex dictis etiam de motu antrorſum & retrorſum
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manifeſtum eſſe docet. </
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">Id igitur hic probat ex eo. </
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">Nam ſi
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in deſcriptione circuli, ſemidiameter vnam tantum lationem
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pateretur, vt verbi gratia naturalem, qua rectà tenderet ver
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ſus, vnam aliquam differentiam ſitus, nunquam ad ipſius dia
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metri perpendiculum perueniret. </
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">Implicat enim vnica la
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tione, aliquid ſimul rectà tendere, ac in tranſuerſum, quem
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admodum ſe habet perpendiculum ad diametrum à qua pro
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pendit: At ſemidiameter circulum deſcribendo, aliquando
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peruenit ad ſuum perpendiculum, ita vt coincidat cum illo:
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Ergo non vnica, ſed duplici latione conuincitur ferri. </
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<
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">Sit enim circulus de
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ſcribendus ABCD, circa
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centrum E. </
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">Sitque dia
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meter AC, ſemidiameter
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vero circulum deſcribens
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AE. </
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<
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">Si igitur ipſa recta
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A E, altero eius extremo
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manente in centro E, al
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tero vero nempè A, cir
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cumferatur, aliquando
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abſque dubio erit in ED,
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quæ eſt perpendicularis
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diametro AC. </
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autem naturalem ipſa AE, deſcendiſſet in FD, vel aliò rectè
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tranſlata fuiſſet. </
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<
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">Non ergo linea circulum deſcribens fertur, </
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