Commandino, Federico, Liber de centro gravitatis solidorum, 1565

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    <archimedes>
      <text>
        <front>
          <section>
            <pb pagenum="1" xlink:href="023/01/009.jpg"/>
            <p type="head">
              <s id="s.000039">FEDERICI COMMANDINI
                <lb/>
              VRBINATIS LIBER DE CENTRO
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              GRAVITATIS SOLIDORVM.</s>
            </p>
          </section>
        </front>
        <body>
          <chap>
            <p type="head">
              <s id="s.000040">DIFFINITIONES.</s>
            </p>
            <p type="main">
              <s id="s.000041">
                <arrow.to.target n="marg1"/>
              </s>
            </p>
            <p type="margin">
              <s id="s.000042">
                <margin.target id="marg1"/>
              1</s>
            </p>
            <p type="main">
              <s id="s.000043">Centrvm grauitatis, Pappus
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              Alexandrinus in octauo ma­
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              thematicarum collectionum
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              libro ita diffiniuit.</s>
            </p>
            <p type="main">
              <s id="s.000044">
                <foreign lang="grc">λέγομεν δέ κέντρον βάρους ἑκάστου σώ
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                ματος ἐ̂ιναι σημε̂ιον τι κείμενον ἐντός, άφ'
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                ὅυ κατ' έποίνιαν ὰρτνθέν τό βάρος ν̔μερε̂ι
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                φερόμενον, καὶ φυλάσσει τήν ἐξ ἀρχῆς θέ­
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                σιν, ὀυ μὴ περιτρεπόμενον ἐν τῆ φορᾶ</foreign>
              . hoc eſt,</s>
            </p>
            <p type="main">
              <s id="s.000045">Dicimus autem centrum grauitatis uniuſcu­
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              iuſque corporis punctum quoddam intra poſi­
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              tum, à quo ſi graue appenſum mente concipia­
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              tur, dum fertur quieſcit; & ſeruat eam, quam in
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              principio habebat poſitionem: neque in ipſa la­
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              tione circumuertitur.</s>
            </p>
            <p type="main">
              <s id="s.000046">Poſſumus etiam hoc modo diffinire.</s>
            </p>
            <p type="main">
              <s id="s.000047">Centrum grauitatis uniuſcuiuſque ſolidæ figu
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              ræ eſt punctum illud intra poſitum, circa quod
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              undique partes æqualium momentorum conſi­
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              ſtunt. </s>
              <s id="s.000048">ſi enim per tale centrum ducatur planum
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              figuram quomodocunque ſecans ſemper in </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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