Valerio, Luca, De centro gravitatis solidorum, 1604
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              PROPOSITIO XXIX.
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              <s>Si ſphæra, vel ſphæroides vnà cum cylindro,
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              vel portione cylindrica ipſi circumſcripta ſecetur
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              plano, haud per centrum, baſibus ſolidi circum­
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              ſcripti parallelo; reliqui ex cylindro, vel portio­
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              ne cylindrica ad maioris portionis ſphæræ, vel
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              ſphæroidis partes abſciſſa, dempta ſphæræ, vel
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              ſphæroidis maiori portione, centrum grauita­
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              tis eſt punctum illud, in quo dicti reliqui ſolidi
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              axis ſegmentum inter duas quartas partes extre­
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              mas ſegmentorum eiuſdem axis, quæ à centro
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              ſphæræ, vel ſphæroidis fiunt interiectum, ſic diui­
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              ditur, vt pars propinquior baſi ſit ad reliquam, vt
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              prædictorum, quæ à centro fiunt axis ſegmento­
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              rum maioris cubus ad cubum minoris. </s>
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              <s>Sit ſphæræ, vel ſphæ­
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              roidi ABCD cuius cen­
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              trum E, circumſcriptus
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              cylindrus, vel portio cy­
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              lindrica FGHK, cum
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              quibus planum per axim
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              communem BED, fa­
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              ciat ſectiones, parallelo­
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              grammum per axim FG
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              HK, & circulum, vel el­
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              lipſim ABCD: quas fi­
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              guras vnà cum dictis ſo­
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              lidis ſecans planum baſibus ſolidi circumſcripti paralle-</s>
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