Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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ſus tùm pilæ, tùm fune-penduli, niſi quia grauitas pi
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læ contrario niſu vim impetus aſcendentis deſtruit. </
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Cap. 4. poſi
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tiuam leui
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tatem noņ
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dari.</
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let? </
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<
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ſit ab impetu dicemus impetum prædictæ pilæ de
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ſcendentis vſque ad centrum, vel perpendiculum ge
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nitum non fuiſſe à vi, & exercitio grauitatis? </
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nam ergo virtute tamquam à principio immediato
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genitus fuit? </
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fatendum eſt à nulla alia cauſa, vel principio exter
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no, ſed tantummodò ab ipſamet grauitate pilæ de
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ſcendentis impetum prædictum genitum fuiſſe, nec
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certitudo ſenſus relinqui debet propter difficulta
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tem adductam ab aduerſario, vt præclarè Ariſtoteles
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præcipit. </
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,
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& cauſa mediata conſequentis aſcenſus, neceſſariò
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actus, & operatio aſcenſus, quæ violenta, & præter
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naturam ſaxi exiſtimatur, efficietur procreabiturque
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ab interno, & naturali principio grauitatis eius, &
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proindè actus aſcenſus, ſeu motus violentus efficie
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tur à principio interno, & naturali. </
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5. phyſ c. 3.</
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">Et hìc obitèr mirari licèt horum philoſophorum̨
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ſecuritatem; hìc negant impetum à grauitate pro
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creari, & inculcant valdè inter ſe differre, & ſe mu
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tuò deſtruere, & vnà
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Ariſtotele in mechanicis a
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pertè fatentur impetum eſſe grauitatem fluentem eſ
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ſeque prorſus eiuſdem naturæ, quia nimirum ſaxum
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impetu affectum comprimit, conterit aduerſa cor
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pora eodem modo, ac ingens pondus efficit. </
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