Valerio, Luca, De centro gravitatis solidorvm libri tres

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              PROPOSITIO XLIV.
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              <s>Si conus & conoides parabolicum circa eun­
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              dem axim ſecentur plano baſi parallelo; fruſti co­
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              nici abſciſſi maiori baſi propinquius erit quàm
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              parabolici centrum grauitatis. </s>
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              <s>Sint conus ABC, & conoides parabolicum EBF,
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              quorum communis
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              axis BD, cuius per
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              quoduis punctum M,
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              planum ſecans ea cor
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              pora plano baſium,
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              quarum diametri A
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              C, EF, parallelo ab­
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              ſcindat fruſta AKL
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              C, cuius centrum gra
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              uitatis N, & EGH
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              F, cuius centrum gra
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              uitatis O, quorum vtrumque erit in communi axe DM.
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              <s>Dico punctum N, propinquius eſse ipſi D quàm punctum
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              O. </s>
              <s>Quoniam enim eſt parabolicifruſti EGHF centrum
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              grauitatis O; erit vt duplum maioris baſis, ideſt circuli
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              EF vna cum minori circulo GH, ad duplum circuli GH
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              vna cum circulo EF, hoc eſt vt duplum quadrati ED vna
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              cum quadrato ED ita MO ad OD. </s>
              <s>Sed vt quadratum
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              ED ad quadratum GM in parabola quæ conoides de­
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              ſcribit, cuius diameter BD, ita eſt DB ad BM, hoc eſt
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              AC ad KL; vt igitur eſt dupla ipſius AC vna cum KL
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              ad duplam ipſius KL vna cum AC ita erit MO ad OD:
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              ſed N eſt fruſti conoici AKLC, centrum grauitatis; pun­
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              ctum igitur N, erit maiori baſi AC propinquius quàm </s>
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