Valerio, Luca, De centro gravitatis solidorvm libri tres

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              <s>
                <pb xlink:href="043/01/118.jpg" pagenum="31"/>
              ABC circumſcripta ad AE cylindrum: vtraque autem
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              circumſcriptarum figurarum excedit ſibi inſcriptam mino­
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              ri ſpacio quantacumque magnitudine propoſita, vt igitur
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              triangulum ABC, ad parallelogrammum AE, ita erit co­
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              noides ABC, ad cylindrum AE. </s>
              <s>Sed triangulum ABC
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              eſt parallelogrammi AE dimidium; igitur conoides ABC
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              eſt cylindro AE dimidium: ſed cylindrus AE eſt coni
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              ABC, triplum: igitur conoides ABC, erit coni ABC
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              ſeſquialterum. </s>
              <s>Quod demonſtrandum erat. </s>
            </p>
            <p type="head">
              <s>
                <emph type="italics"/>
              PROPOSITIO XIX.
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              </s>
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            <p type="main">
              <s>Omnis priſmatis triangulam baſim habentis
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              centrum grauitatis rectam lineam, quæ cuiuſlibet
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              trium laterum bipartiti ſectionem, & oppoſiti pa­
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              rallelogrammi centrum iungit, ita diuidit, vt
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              pars, quæ attingit latus ſit dupla reliquæ. </s>
            </p>
            <p type="main">
              <s>Sit priſma, quale diximus AB
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              CDEF, ſectoque vno ipſius la­
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              tere BF in puncto G, bifariam
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              parallelogrammi oppoſiti ſit cen
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              trum H, & iuncta GH, cuius
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              pars GK ſit dupla reliquæ
                <emph type="italics"/>
              K
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              H.
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              </s>
              <s>Dico priſmatis ABCDEF, cen
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              trum grauitatis eſſe K. </s>
              <s>Per pun
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              ctum enim H ducatur NO ip­
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              ſi AE, vel CD parallela, quæ
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              ipſas AC, ED, ſecabit
                <expan abbr="bifariã">bifariam</expan>
              :
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              iunctisque BN, FO, ducatur per
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              punctum
                <emph type="italics"/>
              K
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              , ipſi FB, vel NO
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                <figure id="id.043.01.118.1.jpg" xlink:href="043/01/118/1.jpg" number="90"/>
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              parallela LM. </s>
              <s>Quoniam igitur eſt vt HK ad KG, ita
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              NL ad LB, & OM ad MF, erit NL, ipſius LB, & OM </s>
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