Valerio, Luca, De centro gravitatis solidorum, 1604

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            <p type="main">
              <s>
                <pb xlink:href="043/01/144.jpg" pagenum="57"/>
              aliam trium harum figurarum pertinentes. </s>
              <s>Quod ſi præ­
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              terea factæ ſectiones hemiſphærij ABC à cylindri AF
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              ſectionibus, circuli à circulis concentricis auferri intelli­
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              gantur; reliquæ totidem erunt ſectiones reliquæ figuræ ſo­
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              lidæ, dempto ABC hemiſphærio ex toto AF cylin­
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              dro, circuli deficientes circulis concentricis, hoc eſt prædi­
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              ctis ABC hemiſphærij ſectionibus prout inter ſe reſpon­
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              dent. </s>
              <s>Nunc ſuper ſectiones hemiſphærij ABC, & co­
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              ni EDF cylindris conſtitutis circa axes, quæ ſunt ſeg­
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              menta æqualia axis BD, intelligantur duæ figuræ ex cy­
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              lindris æqualium altitudinum, altera inſcripta hemiſphæ­
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                <figure id="id.043.01.144.1.jpg" xlink:href="043/01/144/1.jpg" number="111"/>
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              rio ABC, altera cono EDF circumſcripta. </s>
              <s>Si igitur
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              à toto AF cylindro auferatur figura, quæ inſcripta eſt
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              hemiſphærio ABC, relinquetur figura quædam ex cylin­
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              dris circa prædictos axes, vt ſunt BK, KH, HL, LD,
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              deficientibus ijs cylindris, ex quibus conſtat figura inſcri­
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              pta hemiſphærio ABC, & vno integro ſupiemo XF
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              cylindro, circumſcripta reſiduo AF cylindri dempto A
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              BC hemiſphærio, circumſcriptione interna: talis autem
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              figuræ circumſcriptæ centrum grauitatis, per ea, quæ in
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              primo libro, erit in axe BD, quemadmodum & aliarum
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              duarum figurarum ex cylindris, quarum altera inſcripta
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              eſt hemiſphærio ABC, altera cono EDF circumſcripta. </s>
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