Guevara, Giovanni di, In Aristotelis mechanicas commentarii, 1627

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            <p id="N10CBE" type="main">
              <s id="N10CC5">
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              niſi ex principijs geométricis, quare ficat de lride multa
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              pertractantur in Phyſica, quod ramen non tollit omnimodam
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              eius cognitionem ad Perſpectiuam referri, ita quamuis mul­
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              ta de graui & leui ſumantur ex phyſicis, hoc non obſtat quo­
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              minus prout artificiosè mobilia ſunt, ex profeſſo & omnino
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              ſolum cognoſcantur in hac ſcientia ex principijs mathemati­
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              cis. </s>
              <s id="N10CE7">Et ſic, grauia æqualia ex æqualibus diſtantijs æquè pon­
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              derare,
                <expan abbr="vnumq.">vnumque</expan>
              in libra non poſſe aliud vincere, non ſatis
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              probatur ex illo principio physico, quod àctio debeat eſſe ab
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              inæquali proportione. </s>
              <s id="N10CF4">Quando quidem inæqualitas diſtan­
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              tiæ non tollit æqualitatem ponderis, nec proportionem illius
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              ad alterum, ſi ſecundum ſe ac phyſicis conſideretur, tollit
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              autem ſe mathematicè demonſtratur, maiorem diſtantiam à
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              centro, vbi grauia falciantur, grauitatem, vel potiùs effe­
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              ctum illius,
                <expan abbr="actumq.">actumque</expan>
              ponderandi in ipſis grauibus augere.
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              </s>
              <s id="N10D08">Item maior velocitas, ac facilitas quam experimur in motu
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              circulari earum partium, quæ magis diſſant à centro, non
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              probatur à priori, nec demonſtratur ex eo quod maius ſpa­
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              tium percurrant in æquali tempore, nam hoc eſt idem per
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              diuerſa explicare. </s>
              <s id="N10D13">Demonſtratur autem per cauſam, & à
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              priori, ex illo principio mathematico, quod quanto magis li­
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              neæ à centro diſceſſerint, magis participant de motu recto
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              ac naturali,
                <expan abbr="minusq.">minusque</expan>
              retrahuntur in circumuolutione circull,
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              at ſuo lo eo explicabitur ex Ariſtotele qui ſanè in hoc
                <expan abbr="alijsq.">alijsque</expan>
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              dogmatibus mechanicis non vtitur demonſtrationibus geo­
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              metricis ad exemplum, vt in logica vel phyſica, neque ad
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              confirmationem veritatis probatæ; ſed ve abſolutè probet
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              quod aſſumpſerat,
                <expan abbr="quodq.">quodque</expan>
              aliter omninò probare nequiret. </s>
            </p>
            <p id="N10D32" type="main">
              <s id="N10D34">Ex quibus fæcile apparet quid reſpaondendum ſit ad quar­
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              tum & quintum argumentum, nempe principia mathemati­
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              ca non modo in mechanica ſcientia deſeruire ad maiorem
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              claritatem doctrinæ, & vt hæc aptetur ad praxim circa parti­
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              cularia, ſed abſolutè ad demonſtrandas ſuas concluſiones in
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              vniuerſum, quas quippe aliter non poſſet omninò probare.
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              </s>
              <s id="N10D44">Id quod non ſolum verificatur in vni vel altera concluſione,
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              ſed ferè in omnibus, vt in progreſſu conſtabit. </s>
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