Borelli, Giovanni Alfonso, De motionibus naturalibus a gravitate pendentibus, 1670

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              differentiam; & quia proportio FC ad KH compo­
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              nitur ex proportione D minus E ad D plus E, & ex
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              ratione G plus M ad G minus M, ſeu ex ratione D
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              plus E ad R, ergo FC ad KH eamdem rationem ha­
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              bet quam D minus E ad R, & reperta S media pro­
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              portionali inter D minus E, & R erit FC ad CI, vt D
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              minus E ad S, quare factum eſt, quod propoſitum̨
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              fuerat. </s>
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              Bib. noſtro
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              De vi per­
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              cuſſionis pr.
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              92.</s>
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              239.</s>
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              Cap. 11. gra­
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              uia in fluido
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              velocitati­
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              bus inæqua­
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              libus ferri
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              debere.</s>
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              PROP. CCXLI.
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              Datis duobus ſolidis æqualibus, eiuſdemque figuræ, ſed inæ­
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              qualium grauitatum, præcognitarum, & dato quoque
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              pondere molis fluidi leuioris æqualis ſolidis demerſis: re­
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              perire proportionem velocitatum quibus deſcendunt in
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              eodem fluido.
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                <emph.end type="center"/>
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              <s id="s.002595">SInt duæ moles ſolidæ æquales eiuſdemque figu­
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              ræ AC, & GI, ſed inæqualiter graues, v. g. AC
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              ſit aurum, GI verò ſtannum, & facilitatis gratia in­
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              telligantur eſſe parallelepipeda æquè alta, & æqua­
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              lium baſium, & ambo in aqua EHLX demerſa
                <expan abbr="com-parẽtur">com­
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                parentur</expan>
              cum æqualibus, ſimilibuſque parallelepipe­
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              dis aqueis collateralibus DF, & KM cum quibus ſi­
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              phones conſtituere intelligantur, tunc recta NO
                <expan abbr="cõ-iungens">con­
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                iungens</expan>
              centra grauitatum auri AC, & aquæ DF li­
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              bram conſtituet, quæ bifariam ſecta erit in centro,
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              ſeu fulcimento P, propter æqualitatem, & ſimilitudi­
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              nem prædictorum corporum AC, DF ab eiſdem pla­
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              nis horizontalibus comprehenſorum, eiuſdemquę
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              libræ centrum grauitatis ſit T, vnde patet, quod PT
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              eſt longitudo penduli à quo oritur impetus deſcen-</s>
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