Valerio, Luca, De centro gravitatis solidorvm libri tres

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                <pb xlink:href="043/01/212.jpg" pagenum="33"/>
              vel ellipſis circa NO baſibus AQTC portionis parallelæ
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              qua ratione cylindrus, vel portionis cylindricæ FX eiuſ­
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              dem altitudinis portioni AQTC, baſis erit circulus
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              æqualis circulo maximo, vel ellipſis ſimilis, & æqualis ei,
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              cuius diameter NDO, baſibus AQTC portionis paral­
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              lelæ. </s>
              <s>Dico portionem AQTC ad cylindrum, vel por­
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              tionem cylindricam FX, eſſe vt duo rectangula BSR,
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              DES, vnà cum duabus tertiis quadrati ES, ad quadra­
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              tum BD. </s>
              <s>Ijſdem enim conſtructis, & notatis, quæ in an­
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              tecedenti, excepto cylindro, vel portione cylindrica, quæ
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              circa axim ED ſteterat:
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              planum præterea minoris
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              baſis QT portionis AQ
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              TC extendatur: & ſe­
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              cans tria ſolida, & figuras
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              planas per axim poſitas in
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              eodem plano, faciat ternas
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              ſectiones, circulos, vel elli­
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              pſes ſimiles ei, quæ eſt cir­
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              ca NO: & earum diame­
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              tros IX, PV, QT, in
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              eadem recta linea commu­
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              ni ſectione extenſi plani, &
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                <figure id="id.043.01.212.1.jpg" xlink:href="043/01/212/1.jpg" number="156"/>
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              eius, quod per axem: quæ quidem diametri ſectæ erunt om­
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              nes bifariam in centro S communi trium prædictarum pla­
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              narum
                <expan abbr="ſectionũ">ſectionum</expan>
              . </s>
              <s>Denique coni, vel portionis conicæ HDG
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              fruſto PKIV abſciſſo vnà cum portione AQTC, ſit
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              circa axim SE circumſcriptus cylindrus vel portio cylin­
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              drica ZV. </s>
              <s>Quoniam igitur per XIIII huius, reliquum
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              ſolidi FX, dempta portione AQTC, æquale eſt fruſto
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              PKLV; erit reliqua portio AQTC, reliquo eiuſdem
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              ſolidi FX, dempto fruſto PKLV æqualis. </s>
              <s>Et quoniam
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              eſt vt PV ad KL, ita SD, DE, propter ſimilitudinem
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              triangulorum: & vt rectangulum ex KL, & differentia </s>
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