Gassendi, Pierre
,
De proportione qua gravia decidentia accelerantur
,
1646
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túmque accipere à cauſſa, à qua fuerit eius
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initiũ
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; & vice
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verſa habere initium ab eadem cauſſa, à qua fomentum,
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incrementumque acceperit. </
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<
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">Quippe obſeruaui natu
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ram ſic in cæteris comparatam, vt qua ratione progreſ
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ſum parat, eadem exordium faciat; ac habui planè in
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congruum tam imbecillum facere internum rei princi
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pium, vt motum incipiat, qui per totannorum myria
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das ſit inſenſibilis futurus, indigeatque ſemper externo
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motore, qui acceleret, ac perficiat, & vno quidem pro
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pè momento. </
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<
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">Heinc verò eſt, cur, vt dum aqua igni
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admota incaleſcit, non quærimus cauſſam intenſionis,
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ſeu
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graduũ
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caloris ſuperad ditorum, in igne, & cauſſam
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primi gradus in aqua; ſed tam primum gradum, quàm
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cæteros ad ſolum ignem referimus: ita dum lapis inua
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leſcit, acceleraturve in motu, non videatur accelera
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tionis, ſiue partium motus requirenda cauſſa externa; &
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initij, ſeu primæ illius particulæ motus, interna, hoc eſt
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in ipſo lapide: ſed tam pars prima, quàm cæteræ refe
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rendæ videantur ad externam cauſſam. </
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">Vſurpo autem
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aquam in exemplum; quoniam vt illa ex ſe calore deſti
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tuitur, ſic lapis exſe caret motu, quemadmodum in
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telligitur ex poſito caſu, quòd in vacuo, ac non exſiſten
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te præſertim Mundo, conſtitutus ſit; ſecus profectò, ac
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animal, quod habet in ſe ſui motus principium. </
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<
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">Quo
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ſanè loco non parùm ſuſpexi Ariſtotelem, cùm cenſuit
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corpus graue moueri deorsùm
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non à ſe,
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ſed
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ab alio,
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ac inter cæteras rationes, ob quas
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impoßibile
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duxit,
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, fieri talem motum à principio intrin
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ſeco, illam attulit, quod graue alioquin foret anima
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tum;
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cùm à ſe moueri animatorum proprium ſit,
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