Borelli, Giovanni Alfonso, De motionibus naturalibus a gravitate pendentibus, 1670

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            <p type="main">
              <s id="s.002257">
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                <lb/>
              non poterit reperiri aliud corpus quod in vacuo æ­
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              quali tarditate feratur, ac illud in pleno excurrebat;
                <lb/>
              neque hoc incredibile alicui videri poteſt, niſi ijs, qui
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              à falſa perſuaſione præoccupati cenſent corpora inę­
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              qualia in vacuo inæqualibus velocitatibus moueri
                <lb/>
              debere, quod falſum eſſe demonſtrabitur. </s>
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            <p type="margin">
              <s id="s.002258">
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              Quintum re­
                <lb/>
              ſpondetur.</s>
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            <p type="margin">
              <s id="s.002259">
                <margin.target id="marg580"/>
              Cap. 10. de
                <lb/>
              æquitempo­
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              ranea natu­
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              rali veloci­
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              tate
                <expan abbr="grauiũ">grauium</expan>
              .</s>
            </p>
            <p type="main">
              <s id="s.002260">Ad ſextum, ſimilitèr aduerſarij hallucinatio pendet
                <lb/>
                <arrow.to.target n="marg581"/>
                <lb/>
              ex falſa ſuppoſitione, quòd velocitates eiuſdem mo­
                <lb/>
              bilis habeant proportionem contrario
                <expan abbr="reſpondentẽ">reſpondentem</expan>
                <lb/>
              reſiſtentijs mediorum fluidorum, verum eſt maiorem
                <lb/>
              medij reſiſtentiam magis velocitatem eiuſdem gra­
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              uis retardare, ſed non tamen proportionalitèr hu­
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              iuſmodi retardatio efficitur, vt ſupra demonſtraui­
                <lb/>
              mus; & hìc mirari licet, quòd aduerſarius neglectą
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              Galilei demonſtratione tantummodò affert nouas
                <lb/>
              difficultates, qui tamen tenebatur demonſtrationem
                <lb/>
              adductam redarguere, & eius paralogiſmum indica­
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              re, quod non præſtitit. </s>
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            <p type="margin">
              <s id="s.002261">
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              Sexto argu­
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              mento re­
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              ſpondetur.</s>
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            <p type="main">
              <s id="s.002262">Ad argumentum verò dico quòd ſupponendo ple­
                <lb/>
              num denſius magis velocitatem mobilis retardarę,
                <lb/>
              quàm plenum rarum, pariterque poſito, plenum ad
                <lb/>
              vacuum nullam proportionem habere, non indè ſe­
                <lb/>
              quitur velocitatem, quam ſaxum in vacuo exercet,
                <lb/>
              eſſe infinitè maiorem illo impetu, quo in aqua moue­
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              retur, neque hanc velocitatem eſſe illa infinitè tar­
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              diorem, poſſet enim habere proportionem finitam,
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              propterea quod diſtantia inter reſiſtentiam pleni, &
                <lb/>
              nullam vacui reſiſtentiam non eſt quid infinitum, ſed
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              menſuratur ab entitate finita pleni reſiſtentis, quą </s>
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