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

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            <p type="main">
              <s id="s.000558">
                <pb pagenum="112" xlink:href="010/01/120.jpg"/>
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                <lb/>
              ueri, at fluidum collaterale D, quòd ſit hydrargyrum
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              ſupponatur deorsùm tantummodò vim exercere, vt
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              exigit maxima eius grauitas, nec prorsùs ſursùm im­
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                <figure id="id.010.01.120.1.jpg" xlink:href="010/01/120/1.jpg"/>
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              pellere, tunc quoque libra, ſeù
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              rota perpetua efformabitur iņ
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              qua ſemper terminus B trahetur
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              ſursùm à poſitiua leuitate ipſius
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              ligni F aſcendetque versùs R,
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              terminus verò oppoſitus depri­
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              metur ab A versùs H vt naturą
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              grauitatis exigit, & quia hi duo motus, & conatus in
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              oppoſitis terminis libræ
                <expan abbr="cõtrarij">contrarij</expan>
              ſunt, ergò viciſſim
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              ſe non deſtruunt, nec contrariantur, ſed ſe mutuò fa­
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              uent, & adiuuant. </s>
              <s id="s.000559">igitur conatus, & impetus quo re­
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              uoluitur iam dicta libra, ſcilicèt quo lignum F aſcen­
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              dit à fundo mercurij æqualis erit non differentiæ, ſed
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              aggregato ex vi leuitatis F, & ex facultate ponderis
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              mercurij D. </s>
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            <p type="margin">
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              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.000561">
                <emph type="center"/>
              PROP. LIV.
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            </p>
            <p type="main">
              <s id="s.000562">
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              Si verò tam ſolidum, quàm fluidum exerceant leuitatem,
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              atque grauitatem, vis motiua, qua vnum eorum ele­
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              uatur æqualis eſt aggregato ex differentia leui­
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              tatum vnà cum differentia grauitatum
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              earum.
                <emph.end type="italics"/>
                <emph.end type="center"/>
              </s>
            </p>
            <p type="main">
              <s id="s.000563">TAndèm ſi ſupponamus, quod lignum vim faciat
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              ſursùm vt leue, & etiam eodem tempore gra­
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              uitatem eius natiuam exerceat, pariterque aqua D </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>