Valerio, Luca, De centro gravitatis solidorum, 1604

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              <s>
                <pb xlink:href="043/01/205.jpg" pagenum="26"/>
              gulæ ſingulis prædicti coni, vel conicæ portionis
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              partibus ſiue fruſtis inter eadem plana parallela
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              reſpondentibus. </s>
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              <s>Eſto hemiſphærium, vel hemiſphæroides ABC, cu­
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              ius axis BD, baſis circulus, vel ellipſis, cuius diame­
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              ter ADC. ſolido autem ABC circumſcriptus cylindrus,
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              vel portio cylindrica AXEC: & conus, vel coni portio
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              ſit XDE, cuius vertex D, baſis circulus, vel ellipſis cir­
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              ca XBE baſi ſolidi AE, vel ABC, prædictæ oppoſita,
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              ſecto autem ſolido AE, atque vnà cum ipſo eius partibus,
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              ſolidis ABC, XD
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              E, duobus planis ba
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              ſi ſolidi AE, vel
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              ABC, atque ideo
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              inter ſe quoque pa­
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              rallelis, intelligan­
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              tur trium ſolidorum
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              portiones ternæ in­
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                <figure id="id.043.01.205.1.jpg" xlink:href="043/01/205/1.jpg" number="151"/>
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              ter eadem plana pa­
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              rallela: videlicet in­
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              ter duo per XE,
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              FN, hemiſphærij, vel hemiſphæroidis minor portio HBL:
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              & reliquum cylindri, vel portionis cylindricæ FE dem­
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              pta portione HBL: & coni, vel conicæ portionis fruſtum
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              XGME. ſimiliter inter duo plana per FN, OV ſolidi
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              ABC portio PHLT, eaque ablata reliquum ſolidi ON,
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              & fruſtum GQSM. </s>
              <s>Denique ſolidi ABC portio AP
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              TC, eaque ablata, reliquum ſolidi AV, & conus, vel
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              coni portio QDS. </s>
              <s>Dico reliquum ſolidi FE, dempto
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              HBL eſſe æquale fruſto XGME: & reliquum ſolidi ON
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              dempto PHLT, æquale fruſto GQSM: & reliquum
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              ſolidi AV dempto ſolido APTC æquale ſolido QDS. </s>
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