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

Table of figures

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              non poterit reperiri aliud corpus quod in vacuo æ­
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              quali tarditate feratur, ac illud in pleno excurrebat;
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              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
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              debere, quod falſum eſſe demonſtrabitur. </s>
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              Quintum re­
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              ſpondetur.</s>
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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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              <s id="s.002260">Ad ſextum, ſimilitèr aduerſarij hallucinatio pendet
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              ex falſa ſuppoſitione, quòd velocitates eiuſdem mo­
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              bilis habeant proportionem contrario
                <expan abbr="reſpondentẽ">reſpondentem</expan>
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              reſiſtentijs mediorum fluidorum, verum eſt maiorem
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              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
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              mus; & hìc mirari licet, quòd aduerſarius neglectą
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              Galilei demonſtratione tantummodò affert nouas
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              difficultates, qui tamen tenebatur demonſtrationem
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              adductam redarguere, & eius paralogiſmum indica­
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              re, quod non præſtitit. </s>
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              Sexto argu­
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              mento re­
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              ſpondetur.</s>
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              <s id="s.002262">Ad argumentum verò dico quòd ſupponendo ple­
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              num denſius magis velocitatem mobilis retardarę,
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              quàm plenum rarum, pariterque poſito, plenum ad
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              vacuum nullam proportionem habere, non indè ſe­
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              quitur velocitatem, quam ſaxum in vacuo exercet,
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              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, &
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              nullam vacui reſiſtentiam non eſt quid infinitum, ſed
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              menſuratur ab entitate finita pleni reſiſtentis, quą </s>
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