Fabri, Honoré
,
Tractatus physicus de motu locali
,
1646
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ciatur mobile per Poſtulatum, etiam mouetur ſeparatum à potentia mo
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trice per hypoth. </
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<
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">6. igitur non conſeruatur à potentia motrice per Ax.
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10. igitur nec à causâ primò productiua. </
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Theorema
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145.
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Hinc ab alia causâ conſeruari neceſſe eſt impetum
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: Probatur, quia impe
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tus non eſt à ſe, quia deſtruitur aliquando per Ax. 14. igitur conſeruatur
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ab alio per Ax.14. num. </
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<
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">1. non à cauſa primò productiua per Th.144.igi
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tur ab alia, eaque applicata per Ax. 10. quæcumque tandem illa ſit, ali
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quando cauſam primam eſſe demonſtrabimus; </
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<
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">nunc verò ſufficiat dixiſ
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ſe dari aliquam cauſam reuerâ applicatam, quæ ipſum conſeruat impe
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tum; immò ex hac ipſa rerum conſeruatione argumentum aliquando
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ducemus, quo Deum ipſum exiſtere demonſtrabimus. </
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Theorema
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146.
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Si impetus conſeruaretur à cauſa primò productiua, nunquam deſtruere
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tur, quamdiu eſſet applicata.
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</
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<
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"> Demonſtratur, quia eſſet cauſa neceſſaria
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(nam de hac ipſa loquor) igitur ſemper ageret, igitur ſemper con
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ſeruaret, quod eſt contra experientiam; </
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<
s
id
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">nam reuerâ impetus pro
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ductus deorſum à corpore graui motu naturaliter accelerato deſtruitur,
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vt patet; </
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<
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id
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">præterea ſi corpus graue conſeruaret impetum primò produ
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ctum, non produceret nouum contra experientiam; </
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<
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id
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">quippe cauſa ne
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ceſſaria non plùs agit vno inſtanti quàm alio, per Ax.12. adde quod im
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petus deſtruitur ad exigentiam alterius, quidquid tandem illud ſit per
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Ax.14. num.2. & 3. ſed cauſa primò productiua impetus non nouit rerum
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exigentiam; </
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<
s
id
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">igitur illi facere ſatis non poteſt; ex hoc etiam capite cau
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ſæ primæ exiſtentiam ſuo loco demonſtrabimus. </
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Scholium.
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<
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">Obſeruabis primò rem quamlibet ideo deſtrui, quia ceſſat cauſa con
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ſeruans illam conſeruare; </
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<
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id
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">quippe quod deſtruitur eo inſtanti dicitur de
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ſtrui, quo primò non eſt, ſeu quo incipit primò non eſſe; atqui incipit
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primò non eſſe ſeu deſinit eſſe, cum deſinit conſeruari. </
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<
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id
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">Secundò obſeruabis præclarum naturæ inſtitutum, quod etiam ex ipſis
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hypotheſibus conſtat, quo fit vt qualitates quæ carent contrario à cauſa
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primò productiua conſeruentur, vt lumen; </
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>
<
s
id
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">ne ſi ab alia conſeruarentur,
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deſtruerentur vmquam; </
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<
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">cum earum deſtructionem nihil exigeret per
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Ax.14.n.2. & 3. at verò qualitates, quæ contrarias habent: </
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<
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">ſi quæ ſunt,
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à cauſa primò productiua minimè conſeruantur; </
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<
s
id
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">cum enim ideo con
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trarium dicatur deſtruere contrarium, quia exigit eius deſtructionem, id
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eſt, ne conſeruetur amplius; </
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>
<
s
id
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">certè vt cauſa conſeruans ceſſet conſeruare,
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debet noſſe illam exigentiam; atqui nulla cognitione pollent cauſæ illæ
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motrices naturales, de quibus eſt quæſtio. </
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Theorema
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147.
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Tamdiu conſeruatur impetus, quamdiu nihil exigit eius destructionem
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; </
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<
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deſtruitur tantùm ad exigentiam alicuius, quidquid tandem illud ſit, de </
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