Commandino, Federico, Liber de centro gravitatis solidorum, 1565

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    <archimedes>
      <text>
        <body>
          <chap>
            <pb pagenum="10" xlink:href="023/01/027.jpg"/>
            <figure id="id.023.01.027.1.jpg" xlink:href="023/01/027/1.jpg" number="19"/>
            <p type="head">
              <s id="s.000256">THEOREMA VIII. PROPOSITIO VIII.</s>
            </p>
            <p type="main">
              <s id="s.000257">Cuiuslibet priſmatis, & cuiuslibet cylindri, uel
                <lb/>
              cylindri portionis grauitatis centrum in medio
                <lb/>
              ipſius axis conſiſtit.</s>
            </p>
            <p type="main">
              <s id="s.000258">Sit primum af priſma æquidiſtantibus planis
                <expan abbr="contentũ">contentum</expan>
              ,
                <lb/>
              quod ſolidum parallelepipedum appellatur: & oppoſito­
                <lb/>
              rum planorum cf, ah, da, fg latera bifariam diuidantur in
                <lb/>
              punctis klmnopqrstux: & per diuiſiones ducantur
                <lb/>
              plana kn, or, sx. </s>
              <s id="s.000259">communes autem eorum planorum ſe­
                <lb/>
              ctiones ſint lineæ yz,
                <foreign lang="grc">θφ, χψ·</foreign>
              quæ in puncto
                <foreign lang="grc">ω</foreign>
                <expan abbr="conueniãt">conueniant</expan>
              . </s>
              <lb/>
              <s id="s.000260">erit ex decima eiuſdem libri Archimedis parallelogrammi
                <lb/>
              cf centrum grauitatis punctum y; parallelogrammi ah </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>