Valerio, Luca, De centro gravitatis solidorum, 1604

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb xlink:href="043/01/125.jpg" pagenum="38"/>
              dentium parallelogramma in plano EG exiſtentia erunt
                <lb/>
              inter ſe æqualia, atque ſimilia, ſcilicet MS ipſi OQ, &
                <lb/>
              ZO, ipſis RV: ſitque axis KL pars tertia L
                <foreign lang="grc">β</foreign>
              , quarta
                <lb/>
              autem L
                <foreign lang="grc">δ. </foreign>
              </s>
              <s>Quoniam ìgitur ex ſupra demonſtratis priſ­
                <lb/>
              matis ABCDTMPQ eſt centrum grauitatis
                <foreign lang="grc">α</foreign>
              ; duo­
                <lb/>
              rum autem priſmatum oppoſitorum ABYONZ, CDS
                <lb/>
              RXV, centrum grauitatis
                <foreign lang="grc">β</foreign>
              , erit reliqui ex fruſto AB
                <lb/>
                <figure id="id.043.01.125.1.jpg" xlink:href="043/01/125/1.jpg" number="97"/>
                <lb/>
              CDEFGH demptis quatuor prædictis pyramidibus in
                <lb/>
                <foreign lang="grc">α β</foreign>
              centrum grauitatis, quod ſit
                <foreign lang="grc">γ. </foreign>
              </s>
              <s>Nam ex primo li­
                <lb/>
              bro conſtat punctum
                <foreign lang="grc">α</foreign>
              cadere ſupra punctum
                <foreign lang="grc">β</foreign>
              , ſi com­
                <lb/>
              pleatur trapezium ACGE, cuius diameter erit KL. </s>
              <s>Sed
                <lb/>
              earum quatuor pyramidum eſt centrum grauitatis
                <foreign lang="grc">δ. </foreign>
              </s>
              <s>Si
                <lb/>
              enim baſium, quibus binæ oppoſitæ pyramides inſiſtunt
                <lb/>
              centra grauitatis, & bini oppoſiti vertices ſingulis rectis li-</s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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