Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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fuſiùs & accuratiùs infra oſtendetur. </
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Cap. 10. de
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æquitempo
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ranea natu
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rali veloci
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tate
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<
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">Inquirendum modò eſt, an omnia corpora natura
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lia æqualibus velocitatibus, an verò inęqualibus mo
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ueri debeant in eodem inani ſpatio. </
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">& primo intuitu
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videtur incredibile, & abſurdum æquè velocia eſſę
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debere cùm in lationibus naturalium corporum ha
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benda præcipuè ratio ſit facultatum motus efficienti
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um quæ procul dubio à viribus grauitatum
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corporum
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, atque hæ planè inæquales eſſe vi
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dentur, & propterea impetus, & velocitates, ab eis
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pendentes erunt quoque inter ſe inæquales. </
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Ariſtotele paſſim in phyſ. & de Cœl. aſſeritur; erit igi
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tur operæpretium abſurditatem eius propoſitionis
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euincere; ait ergo, grauia ſecundùm proportionem̨,
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quam grauitates habent, moueri, pariterque leuią
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corpora, velocitates ipſis leuitatibus proportiona
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les habere, & quod magis mirere, ait hoc obſeruari,
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ac ſenſibus patere, habet enim, ſi fuerint duæ moles
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inæquales eiuſdem corporis, nempè aeris, aſcendent
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quidem ſursùm inæqualibus velocitatibus, & ſecun
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dùm proportionem quam habent earum magnitudi
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nes ea prorsùs ratione (inquit ipſe) qua videmus duas
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moles inæquales terræ (ſi cætera ſint paria) maiorem
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deſcendere velociùs, quàm minorem, ſecundùm pro
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portionem, quam magnitudines habent. </
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omninò falſum eſt, vt ſenſuum euidentia conſtat. </
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enim duæ pilæ ferreæ inæquales fuerint, vna ſcilicèt
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centum vnciarum, altera vnius (ſic enim conuenien
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tia, & paritas ſeruatur in figuris ſphæricis, ſimilibus, </
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