Valerio, Luca, De centro gravitatis solidorvm libri tres

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      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb xlink:href="043/01/137.jpg" pagenum="50"/>
              trum grauitatis. </s>
              <s>Quod demonſtrandum erat. </s>
            </p>
            <p type="head">
              <s>
                <emph type="italics"/>
              PROPOSITIO XXX.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="main">
              <s>Omnis prædictæ figuræ centrum grauitatis
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              eſt propinquius baſi, quàm cuiuſlibet figuræ ex
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              cylindris, vel cylindri portionibus, vel parallelo­
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              grammis æqualium altitudinum ipſi circumſcri­
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              ptæ. </s>
            </p>
            <p type="main">
              <s>Sit prædicta figura ABC, cuius axis vel diameter BD,
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              & data intelligatur figura ex quotcumque cylindris, vel cy­
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              lindri portionibus, vel parallelogrammis æqualium altitu­
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              dinum figuræ ABC circumſcripta, cuius ſit centrum gra­
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              uitatis E, nempe in axe vel
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              diametro BD. </s>
              <s>Dico cen­
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              trum grauitatis figuræ ABC
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              propinquius eſſe puncto D,
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              quàm punctum E. </s>
              <s>Si enim
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              fieri poteſt, centrum grauita­
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              tis figuræ ABC, quod ſit
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              F, non cadat infra punctum
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              E, ſed vel ſupra, vel con­
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              gruat puncto E: figuræ ita­
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              que ABC circumſcribatur
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              figura quædam ex cylindris,
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              vel cylindri portionibus, vel
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              parallelogrammis <17>qualium
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              altitudinum, cuius centrum
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                <figure id="id.043.01.137.1.jpg" xlink:href="043/01/137/1.jpg" number="106"/>
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              grauitatis, quod ſit G, ſit propinquius D puncto, quàm
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              punctum E, ac propterea propinquius, quàm punctum F,
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              centrum grauitatis figuræ primo circumſcriptæ. </s>
              <s>Rurſus
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              multiplicatis cylindris, vel cylindri portionibus, vel paral-</s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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