Borro, Girolamo, De motu gravium et levium, 1575

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                priè non mouentur: maior eſt inductione manifeſta, Animal
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                enim omne à ſe per ſe propriè mouetur; ideo ad omnem loci
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                differentiam fertur. </s>
                <s id="s.000958">Maior etiam notissima est; & eius ſum
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                ma veritas ex eo conſtat, quod grauia elementa deorſum tan­
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                tum, & non surſum, & leuia surſum tantum, & non deorſum
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                à natura incitantur.
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              <p type="main">
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                Dicet quis: Ignis ad communem concaui lunæ locum à ſe
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                ipſo ferri æquè potest, perinde ac terra in ſingulas centri par­
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                tes deſcendere valent: ergo ad omnes loci differentias, etiam
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                contrarias datum est illis à natura vt ferantur: ergo falſum
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                est id, quod vt verum aſſumpſimus, elementa ad contraria
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                loca non ferri.
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                Ei qui hac ratione diſputauerit, reſponderemus: Ignis licet
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                ad communem concaui lunæ locum, & ad ſingulas loci illius
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                differentias licet vi, naturaque ſua ferri æquè possit: & terra
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                licet in omnem centri partem concitari valeat, ignis tamen
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                extra proprium locum poſitus ſic comparatus est à natura,
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                vt deſcendere nequeat; ſed tantum vt possit ſurſum aſcende­
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                re: terræ item extra proprium locum conſtitutæ aſcendere
                  <expan abbr="">non</expan>
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                datur, ſed natura deſcendere tantum ei donatur: quapropter
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                non ad omnes loci differentias grauia, & leuia feruntur; ſed
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                ad terminatas, & à natura statutas.
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                Quarto eadem propoſitio hoc argumento ab Ariſtotele eo­
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                dem loco confirmatur: Nullum continuum, per ſe propriè à
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                ſe ipſo mouetur, elementum quodlibet eſt continuum: ergo nul
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                lum elementum per ſe propriè à ſe ipſo mouetur: maior propo
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                ſitio probatur: dum minor quia nata, intacta derelinquitur.
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                </s>
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              <p type="main">
                <s id="s.000962">
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                Quod à ſe ipſo per ſe propriè mouetur, in
                  <expan abbr="partẽ">partem</expan>
                per ſe mo­
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                tam, & in partem per ſe mouentem neceſſariò diuiditur; cum
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                omne, quod mouetur motorem à ſe ipſo distinctum habeat, vt
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                </s>
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