Gassendi, Pierre
,
De proportione qua gravia decidentia accelerantur
,
1646
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potius eſſe caſum ab acceleratione violentum, quàm à ſimplici
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motu naturalem. </
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<
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">Quàm parùm autem cenſendum ſit, quod
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ex ſimplici motu eſt, ex eo probatur, quòd ſi qualis incipit mo
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tus quo momento primo eſt adhûc ab acceleratione liber, talis
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perſeueraret per duarum
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altitudinem; ille, aſſumpto
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pro primo momento, vno minuto ex ijs, quæ decima vocant, non
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dum eſſet planè peractus poſt annos
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5322380:
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neque adeò lapis,
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ſi occœpiſſet illo motu ab vſque initio Mundi cadere, perfeciſſet
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iam ſeptimam vnam digiti partem. </
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<
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">Deinde, cùm illud vio
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lentum dicatur, cuius principium extra eſt; etiam deſcenſus, ſeu
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ſimplex motus eſſe comprobatur à principio externo, nempe à
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virtute attractrice Terræ (credebatur tunc poſſe quoque aër à
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tergo impellere) tum quia lapis ſeu intra vacuum (vbi nihil
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cum Mundo, Terráque adeò communicaret, ac perinde illi fo
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ret, ſeu eſſet, ſeu non eſſet Mundus) ſeu intra aërem infinitum
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(ſi ſolus præter ipſum foret) talem motum nullum haberet:
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tum quia quæ res ſunt intenſionis capaces, à qua cauſſa habent
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gradus reliquos, ab ea nanciſcuntur & primum; atque adeò,
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vti dum calefit aqua, non cæteri gradus ab externo ſunt, pri
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mus ab interno principio, ſed omnes ab externo ſunt: ita dum
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lapis deorsùm mouetur, non cæteræ motus partes ab externa
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cauſſa, & prima ab interna ſunt; verùm ſunt omnes ab ex
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terna.
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A p. </
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">ART. XI. XII. XIII. XIV. </
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attrahere; &, Quid illi contingeret, ſi verſus
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Lunam dimoueretur? </
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nicem ad centrum Terræ conſtitueretur? </
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Cùm attrahi grauia à Terra videantur, ob cauſſam iam
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expoſitam: Ad illud, quod quærit R. P. quid ipſi Terræ con-
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