Guevara, Giovanni di
,
In Aristotelis mechanicas commentarii
,
1627
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dem, vel æquali potentia; ſicut celerius mouentur maiores
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libræ, quàm minores ab eodem, vel æquali pondere. </
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<
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">Non
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enim aliter ſe habet circulus ſtans ſuper planum, quàm libra
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ſupra fulcimentum in æquilibrio conſtituta. </
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<
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">At Ariſtotelem per angulos circuli intelligere angulos
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à nobis explicatos, illud confirmat, quod cum dixiſſet an
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gulum circuli maioris habere nutum ad angulum circuli
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minoris, quaſi id probans ait: Et ſicut diameter ad diame
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trum, ita circumferentia ad circumferentiam. </
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<
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">In quibus
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verbis vtrumque ipſorum angulorum latus comprehendit
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nempe rectum, &
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eſt, ac dicere, quia
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præ
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dicti anguli conſtent ex huiuſmodi lateribus, ſicut latera ma
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iora, eo quod magis diſtent à centro, velocius mouentur; ita
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pariter angulus ex illis conſtitutus, velocius mouebitur; ma
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gis enim diſtat à centro extremum diametri maioris, quàm
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minoris, ſimiliter que portio maioris circumferentiæ ab illo
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deſcriptæ, quàm minoris, vt per ſe patet. </
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<
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">Quod autem Baldus obijcit Ariſtoteli, prædictum nu
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tum, quem ipſe gratis explicat per angulos sectores, nul
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lam arguere maiorem mobilitatem circuli maioris, eo quod
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quantum vnus ſector adiuuat deſcenſum ex vna parte, tan
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tum alter oppoſitus retardet aſcenſum ex alia, nihil con
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uincit. </
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<
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id
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">Nam idem dici poſſet de extremitate diametri lon
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gius à centro diſtante, vt nihil conferat ad maiorem veloci
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tatem, eo quod altera extremitas tantundem debeat retar
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dare; Quod ſanè falſum eſt, quoniam tam in illo, quàm in
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iſto motu ſupponitur impetus aliquis impreſſus, virtute cu
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ius motus ipſe exerceatur, ac vna pars circuli, vel diametri
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ſuperet aliam æqualem. </
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<
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">Alioquin ſicut ſola maior diſtan
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tia extremitatis diametri non ſufficit ad motum illius; ita
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nec maior nutus circuli maioris. </
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<
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">Vtrumque tamen confert
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ad velocitatem ſuppoſito motu. </
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<
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id
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N1419E
">Nam virtus illa impreſſa
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nutu proprio ipſius circuli adiuta, efficacius operatur in ea
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parte vbi imprimitur, vel in quam prius impreſſa fuerit à
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motore. </
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<
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<
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