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

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      <text>
        <body>
          <chap>
            <p type="main">
              <s id="s.000369">
                <pb pagenum="79" xlink:href="010/01/087.jpg"/>
                <arrow.to.target n="marg86"/>
              </s>
            </p>
            <p type="margin">
              <s id="s.000370">
                <margin.target id="marg85"/>
              Cap. 3. flui­
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              dum in ſuo
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              toto quie­
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              ſcens pon­
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              derat.</s>
            </p>
            <p type="margin">
              <s id="s.000371">
                <margin.target id="marg86"/>
              Cap. 4. poſi­
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              tiuam leui­
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              tatem noņ
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              dari.</s>
            </p>
            <p type="main">
              <s id="s.000372">
                <emph type="center"/>
                <emph type="italics"/>
              Poſitiuam leuitatem in rerum natura
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              non dari.
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                <emph.end type="center"/>
              </s>
            </p>
            <p type="main">
              <s id="s.000373">
                <emph type="center"/>
              CAP. IV.
                <emph.end type="center"/>
              </s>
            </p>
            <p type="main">
              <s id="s.000374">HActenùs conſiderauimus grauitatem non om­
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              nium corporum fluidorum, ſed tantummodò
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              aquæ, hydrargyri, & ſimilium, de quorum pondero­
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              ſitate nemo dubitat, manifeſtè enim deorsùm ten­
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              dunt, atque deſcendunt. </s>
              <s id="s.000375">difficultas vertitur circą
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              reliqua corpora, quæ ſursùm aſcendere videntur, vt
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              ſunt ligna, & alia corpora, quæ in aqua ſursùm
                <expan abbr="aſcẽ-dunt">aſcen­
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                dunt</expan>
              , in his enim grauitatem ponere, videtur contra
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              communem conceptum; nihilominùs cum melioris
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              notæ Philoſophis oſtendere conabimur omnia cor­
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              pora fluida elementaria grauitatem habere, leuita­
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              tem verò poſitiuam abſolutè in natura non dari, ita­
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              que
                <expan abbr="oſtendẽdum">oſtendendum</expan>
              eſt omnia corpora elementaria ha­
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              bere vim ſe ſe vniendi ad efformandum noſtrum Sy­
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              ſtema, ſcilicèt habere facultatem motiuam deſcen­
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              dendi versùs centrum globi terreſtris, & huiuſmodi
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              vis vocatur grauitas. </s>
              <s id="s.000376">Et primo loco examinabimus
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              argumenta Ariſtotelis facta contra Platonem, & De­
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              mocritum prædictæ ſententiæ aſſertores, poſtea ad
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              examen reuocabimus rationes eiuſdem Ariſtotelis,
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              quibus leuitatem poſitiuam ſtatuere conatur. </s>
              <s id="s.000377">Tertio
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              loco afferam demonſtrationes, quibus euincitur non
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              dari leuitatem poſitiuam; & tandem conſidèrabo ea
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              omnia, quæ paſsìm à melioribus Peripateticis con-</s>
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          </chap>
        </body>
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