Valerio, Luca, De centro gravitatis solidorvm libri tres

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        <body>
          <chap>
            <p type="main">
              <s>
                <pb xlink:href="043/01/123.jpg" pagenum="36"/>
              rum quartæ partes EN, FO, & iungatur NO. </s>
              <s>Quoniam
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              igitur propter æqualitatem altitudinum, & quia EF, GH,
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              ſunt in eodem plano, ſunt EF, GH, inter ſe parallelæ, &
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              vt GN ad NE, ita eſt HO ad OF; erit NO ipſi E Fivel
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              GH, paralle­
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              la, quas KL
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              bifariam ſecat:
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              igitur & ipſam
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              NO ſecabit bi
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              fariam, iungit
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              autem recta
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              NO centra
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              grauitatis
                <expan abbr="py-ramidũ">py­
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                ramidum</expan>
              æqua­
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              lium GAC,
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              HDB, vtriuſ­
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                <figure id="id.043.01.123.1.jpg" xlink:href="043/01/123/1.jpg" number="95"/>
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              que ergo pyramidis ſimul centrum grauitatis erit in com­
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              muni ſectione duarum linearum KL, NO, ſed recta NO,
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              ſecans ſimiliter ipſas GE, KL, HF, ipſam KL, ſecabit
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              in puncto M; punctum igitur M, erit prædictarum pyrami­
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              dum centrum grauitatis. </s>
              <s>Quod demonſtrandum erat. </s>
            </p>
            <p type="head">
              <s>
                <emph type="italics"/>
              PROPOSITIO XXIII.
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              </s>
            </p>
            <p type="main">
              <s>Omnis fruſti pyramidis baſim habentis paral­
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              lelogrammum centrum grauitatis maiori baſi eſt
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              propinquius, quam punctum illud, in quo axis ſic
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              diuiditur, vt pars minorem baſim attingens ſit ad
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              reliquam vt dupla cuiuſuis laterum maioris baſis
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              vna cum latere minoris ſibi reſpondente, ad
                <expan abbr="duplã">duplam</expan>
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              dicti lateris minoris baſis vna cum maioris ſibi
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              reſpondente. </s>
            </p>
          </chap>
        </body>
      </text>
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