Commandino, Federico, Liber de centro gravitatis solidorum, 1565

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    <archimedes>
      <text>
        <body>
          <chap>
            <p>
              <s id="s.000426">
                <pb pagenum="20" xlink:href="023/01/047.jpg"/>
              beat eam, quam
                <foreign lang="grc">χτ</foreign>
              ad
                <foreign lang="grc">τ</foreign>
              f erit diuidendo ut
                <foreign lang="grc">χ</foreign>
              f ad f
                <foreign lang="grc">τ</foreign>
              , ita fi
                <lb/>
              gura ſolida inſcripta ad partem exceſſus, quæ eſt intra pyra
                <lb/>
              midem. </s>
              <s id="s.000427">Cum ergo à pyramide, cuius grauitatis
                <expan abbr="ceũtrum">centrum</expan>
              eſt
                <lb/>
              punctum f, ſolida figura inſcripta auferatur, cuius
                <expan abbr="centrũtrum">centrum</expan>
                <lb/>
                <foreign lang="grc">τ</foreign>
              : reliqua magnitudinis conſtantis ex parte exceſſus, quæ
                <lb/>
              eſt intra pyramidem, centrum grauitatis erit in linea
                <foreign lang="grc">τ</foreign>
              f
                <lb/>
              producta, & in puncto
                <foreign lang="grc">χ</foreign>
              . </s>
              <s id="s.000428">quod fieri non poteſt. </s>
              <s id="s.000429">Sequitur
                <lb/>
              igitur, ut centrum grauitatis pyramidis in linea de; hoc
                <lb/>
              eſt in eius axe conſiſtat.</s>
            </p>
            <p>
              <s id="s.000430">Sit conus, uel coni portio, cuius axis bd: & ſecetur plano
                <lb/>
              per axem, ut ſectio ſit triangulum abc. </s>
              <s id="s.000431">Dico centrum gra
                <lb/>
              uitatis ipſius eſſe in linea bd. </s>
              <s id="s.000432">Sit enim, ſi fieri poteſt,
                <expan abbr="centrũ">centrum</expan>
                <lb/>
                <figure id="id.023.01.047.1.jpg" xlink:href="023/01/047/1.jpg" number="36"/>
              e:
                <expan abbr="perq;">perque</expan>
              e ducatur ef axi æquidiſtans: & quam propor­
                <lb/>
              tionem habet cd ad df, habeat conus, uel coni portio ad
                <lb/>
              ſolidum g. </s>
              <s id="s.000433">inſcribatur ergo in cono, uel coni portione </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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