Gassendi, Pierre, De motu impresso a motore translato epistulae duae, 1642

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              <s id="id.000368">
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              runt nihil eſſe aliud, quàm ſpecies quaſdam motus lo­
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              calis. </s>
              <s id="id.000369">Deinde nullus videtur motus, qui ſecluſo primæ­
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              uo illo, non poſſit cenſeri violentus: quatenus nullus eſt,
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              qui niſi cum impulſione vnius rei in aliam fiat, ex quo
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              effectum eſt, vt Ariſtoteles, etiam rerum cadentium
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              quæſierit motorem externum, principium nempe
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              generans; & in motibus animalium diſtinguendas
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              cenſuerit parteis, quarum aliæ mouerentur ab aliis,
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              ad vſque vnam, que moueret, per ſe immota. </s>
              <s id="id.000370">Ne­
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              que videri ab ſurdum debet, eſſe continuam aliquam
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              in rebus naturæ violentiam; quoniam ipſa quoque
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              violentia ex eò cenſeri naturalis poteſt, quod Au­
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              thor naturæ illam inſtituerit, quæ gignundis rebus
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              naturalibus inſeruiret; cum conſtet nihil alterari,
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              nihil interire, nihil exoriri, abſque motu reciproco,
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              ſiue actione, & reactione, qua vnaquæque res vim
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              patiatur; adeo proinde vt violentia naturas ſingu­
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              lareis ſolùm, non vniuerſalem attineat. </s>
              <s id="id.000371">Prætereà
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              cum motus naturalis, & violenti voces non videan­
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              tur nobis eſſe confundendæ, ea mihi ſemper vtriuſ­
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              que notio viſa eſt commodiſſima, vt naturalis ap­
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              pelletur, qui aut ſponte, aut ſine vlla repugnantia
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              fit: violentus, qui præter naturam, aut cum aliqua
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              repugnantia. </s>
              <s id="id.000372">Ita inceſſus animalis naturalis eſt, quia
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              ſponte ſit: ſaltatio violenta, quia cum aliqua repu­
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              gnantia. </s>
              <s id="id.000373">Ita trajectio globi per aërem violenta, quia
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              præter naturam; volutio ſupra planum naturalis,
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              quia nihil repugnat. </s>
              <s id="id.000374">Rurſùs, quia ſæpenumerò cau­
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              ſa ſeu ſpontanea, ſeu repugnans non apparet, &
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              quæri poteſt quoddam criterium, quo diſcerni va-</s>
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