Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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ſitum, qui fieri poteſt nedum in fluido, ſed etiam in
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ſpatio inani, per quamlibet directionem, quam im
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preſſa vis motiua deſignauerit, ergo licèt in vacuo di
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rectiones infinitę in eo deſignabiles non ſint deter
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minatæ, nec habeant nomina propria, non proindè
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ſequitur non poſſe in eo deſignari, & ſic effici motus
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per quamcumque directionem. </
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Cap. 8.</
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Cap. 12. dę
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vacui neceſ
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ſitate.</
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<
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">Quartò ſic ait,
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mouentur proiecta ex eo quod quando
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tanguntur, tunc ob anthiprestaſim, aut quia pulſus aer mo
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tu pellit celeriori, quàm ſit ea latio pulſi, at in vacuo nihil
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horum eſſe potest, neque fit vt quicquam feratur niſi vt
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quod vehitur.
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<
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telis, concedatur, quod in vacuo ob carentiam medij
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fluidi proiectio fieri non poſſit, non inde ſequitur va
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cuum minimè dari poſſe, nam remaneret ſolummodò
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motus naturalis in vacuo, & hic
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cum proiectitio
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in pleno fluido fieri poſſet, neque Ariſtot. oſtendit
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hoc eſſe abſurdum. </
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<
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moueri à medio fluido poſtquam à proijciente deſe
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runtur, ſed à vi motiua ipſis communicata promoue
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ri, vnde ſequitur, quòd benè in ſpatio vacuo proie
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ctio fieri poſſet multò meliùs quàm in ſpatio pleno
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fluido, cum vis motiua proiecto impreſſa nullo pacto
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impediatur ab inani ſpatio, ſicuti à medio fluido
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mopere</
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impeditur retardaturque. </
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De vi per
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cuſs. </
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<
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<
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nemo dicere potest propter quid quod mouetur
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stabit alicubi, cur enim magis hic,
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quã
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alibi; quare aut quie
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ſcat, aut in infinitum feratur neceſsè eſt, ſi non
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quic
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piam impedierit.
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<
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