DelMonte, Guidubaldo, In duos Archimedis aequeponderantium libros Paraphrasis : scholijs illustrata
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              lem vtriſ〈que〉 duplæ ipſius AF, & ipſi DG. ostenden­
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              dum est frusti ADEC centrum grauitatis eſſe punctum 1.
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              ſit quidem ipſi FB æqualis MN, ipſi verò GB æqualis NO.
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              ſumaturquè ipſarum MN NO media proportionalis NX.
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              quarta verò proportionalis TN.
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              lineæ nimirum MN NX
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              NO NT in continua erunt proportione.
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              & vt TM
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              ad TN, ita
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              fiat
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              FH ad quandam lineam à puncto I, vt
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              R, vbi­
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              cun〈que〉 perueniat alterum punctum
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              R.
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              nihil enim refert, ſiue inter
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              FG, ſiue inter GB cadat. </s>
              <s id="N178BF">& quoniam in portione rectanguli coni
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              ABC
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              diameter portionis est FB; at verò BF, vel prin­
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              cipalis est diameter portionis, vel ducta diametro æquidistans.
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              lineæ verò AF DG ad ipſam ordinatim ſunt ap­
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              plicatæ, cùm ſint æquidistantes contingenti portionem
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