Guevara, Giovanni di
,
In Aristotelis mechanicas commentarii
,
1627
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Quod cum partim ad merè phyſicam ſpeculationem perti
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neat in 7. & 8. de phyſico auditu; partim verò infra cum
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Ariſtotele quæſt. </
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<
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">32. & 33. explicandum ſit, hìc non erit
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diſcutiendum, ſed tantum ex dicendis, ac probandis ſuppo
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nere oportet, nullam vnquam inferri poſſe violentiam per
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motum localem abſque productione, ac impreſſione quali
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tatis cuiuſdam in ipſo mobili, quæ communiter appellari ſo
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let impetus ſiue impulſus, ac de qua ſæpe nobis redibit ſer
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mo in ijs quæſtionibus. </
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<
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">Diximus autem grauitatem
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abbr
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quandoq.
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ad ſui motionem
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violentam concurrere, quia cum deorſum magna vi ponde
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ra extruduntur, vis illata, & impetus incuſſus, grauitate mo
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bilis intenditur, & augetur, vt quæſt. </
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<
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">32. probabitur. </
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">Vnde
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licet quoad velocitatem, & modum tunc motus ipſe deor
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ſum
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abbr
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cõſtituatur
">conſtituatur</
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præternaturalis, ad eum tamen grauitas ip
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ſa non minus, ac impetus concurrit. </
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s
id
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">Quod contra ſe habet
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cum ſurſum, vel ad latera graue transfertur; quia grauitas
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ſicut ſemper tendit deorſum, ita
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cuicumq;
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alio motui ſem
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per obſiſtit, quamuis propriè non contrarietur virtuti, à qua
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talis motus procedit, nec ſit incompoſſibilis cum illa in eo
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dem ſubiecto, vt ibidem explicabitur. </
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<
s
id
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">Deinde moueri poſſe diximus ipſa grauia
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abbr
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ſecundũ
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quam
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cumque poſitionem atte, ac violentia; quia nec violentiæ
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præſcripta eſt poſitio ſecundum quam duntaxat mouere
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valeat, non verò ſecundum aliam, nec arti deficiunt præce
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pta, & inſtrumenta, quibus ita vis eis applicetur; vt quoquò
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verſum, etiam contra naturæ leges grauia transferantur. </
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">Vn
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de pluribus, ac innumeris penè modis arte comparatis vio
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lentia poteſt inferri. </
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<
s
id
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">Quos tamen Ariſtoteles 7. Phyſic. tex.
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10. ad quatuor tantum reducit, iuxta quos to idem ſpecies
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motus violenti conſtituit: Quadrifariam, inquiens, moueri
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quidquid ab alio per violentiam ſecundum locum mouetur.
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</
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<
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id
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">Nimirum vel per Pulſionem, vel per Tractionem, vel per
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Vectionem, vel per Vertiginem. </
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">Pulſionem autem diſtin
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guit in Impulſionem, & Expulſionem. </
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<
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">Impulſionem ait eſſe
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cum pellens ita pellit, vt pulſum non deſerat, ſed comite</
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