Borro, Girolamo
,
De motu gravium et levium
,
1575
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ſcriptum eſt ab Auerroe libro quarto de cælo commentatione
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quadrageſima: quia locus ſuperior loco ignis, ſimpliciter, &
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abſolutè leuis ſub luna non datur; ex quo leuissimus ignis de
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ſcendat, poſtquam eò ſuopte impulſu aſcenderit: perinde ac lo
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cus inferior centro non inuenitur, ex quo terra ad eum lo
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cum, in quo nunc est, aſcendat, poſtquam eò deſcenderit.
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<
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">Cauſa etiam quare ignis expers est cuiuslibet grauitatis, &
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terra cuiuslibet leuitatis, aer, & aqua tum grauitatis, tum le
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uitatis eſt particeps, ibi ab eodem Auerroe redditur. </
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<
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id
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">Et ea eſt:
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quia inferius ſimpliciter, & ſuperius ſimpliciter in natura in
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uenitur; & cauſa, quamobrem hæc duo in natura
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inueniũtur
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,
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eſt: quia extrema maximæ diſtantiæ ſunt in rerum vniuerſi
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tate, & cauſa, quare hæc reperiuntur, eſt, quia horum
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alterũ
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est centrum, alterum circumferentia. </
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id
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">Porrò cauſa, propter
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quam media elementa vt aer, & aqua, non ſunt ſimpliciter,
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& abſolutè, aut grauia, aut leuia, ſed ad duo extrema com
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parata modo grauia, & modo leuia cenſentur, est: quia non
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ſunt in loco, aut ſimpliciter inferiore, aut abſolutè ſuperiore;
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nec ſunt in locis maximè distantibus; quorum alterum ſit cen
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trum, alterum circumferentia: ſed ſunt in locis mediis, me
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diæ naturæ corporibus optimo iure tributis.
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Hæ ſunt Auerrois cauſæ; quibus addendum, nec abſque
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ratione putamus vim, & naturam propriam, ſeu energiam
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cuiuslibet elementi, quæ cauſa est, ob quam vnumquodque ele
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mentum ſit aut graue, aut leue, aut ſimpliciter, aut ad aliud
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comparatum: ſunt enim grauitas, & leuitas propriæ
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corporũ
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grauium, & leuium affectiones, quæ eorumdem formas neceſ
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ſariò conſequuntur: & ex illis quaſi aquæ ex propriis fonti
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bus, manant: eadem enim ſunt prima ſpecierum, & proprie
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tatum principia: vt quia homo eſt rationis particeps, eſt etiam
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