Valerio, Luca, De centro gravitatis solidorvm libri tres

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    <archimedes>
      <text>
        <body>
          <chap>
            <pb xlink:href="043/01/011.jpg" pagenum="3"/>
            <p type="head">
              <s>DEFINITIONES.</s>
            </p>
            <p type="head">
              <s>I.</s>
            </p>
            <p type="main">
              <s>Figuræ aliquæ planæ multilateræ centrum ha­
                <lb/>
              bere dicuntur punctum illud, in quo omnes rectæ
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              lineæ vel angulos oppoſitos iungentes bifariam
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              ſecantur, vel ab angulis ductæ ad laterum op­
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              poſitorum bipartitas ſectiones in eaſdem ra­
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              tiones. </s>
            </p>
            <p type="head">
              <s>II.</s>
            </p>
            <p type="main">
              <s>Circa diametrum eſt figura plana, in qua re­
                <lb/>
              cta quædam, quæ diameter figuræ dicitur, omnes
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              rectas alicui parallelas, à figura terminatas bi­
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              fariam diuidit. </s>
            </p>
            <p type="head">
              <s>III.</s>
            </p>
            <p type="main">
              <s>Octaedrum communiter dictum, eſt figura ſoli­
                <lb/>
              da octo triangulis binis parallelis, æqualibus, &
                <lb/>
              ſimilibus comprehenſa. </s>
            </p>
            <p type="head">
              <s>IIII.</s>
            </p>
            <p type="main">
              <s>Polyedri regularis centrum dicitur punctum,
                <lb/>
              in quo omnes rectæ lineæ, quæ ad angulos oppo­
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              ſitos pertinent bifariam diuiduntur. </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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