Archimedes, Archimedis De iis qvae vehvntvr in aqva libri dvo

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DE IIS QVAE VEH. IN AQVA.
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          <head xml:space="preserve">DEMONSTRATIO SECVNDAE PARTIS.</head>
          <p>
            <s xml:space="preserve">ITAQVE primum habeat portio ad humidum in
              <lb/>
            grauitate proportionem quidem maiorem, quàm qua dra
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            tum x o ad quadratum b d; </s>
            <s xml:space="preserve">minorem uero, quàm quadra
              <lb/>
            tum, quod fit ab exceſſu, quo axis eſt maior, quàm ſeſquial-
              <lb/>
            ter eius, quæ uſque ad axem, ad quadratum b d: </s>
            <s xml:space="preserve">& </s>
            <s xml:space="preserve">quam
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            proportionem habet portio ad humidum in grauitate, eã
              <lb/>
            habeat quadratum, quod fit à linea ψ ad quadratum b d:
              <lb/>
            </s>
            <s xml:space="preserve">erit ψ maior quidem, quàm x o, minor uero, quàm exceſ-
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              <anchor type="note" xlink:label="note-0085-01a" xlink:href="note-0085-01"/>
            ſus, quo axis eſt maior, quàm ſeſquialter eius, quæ uſque ad
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            axem. </s>
            <s xml:space="preserve">aptetur quædam recta linea m n conicis ſectioni-
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            bus a m q l,
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              <anchor type="figure" xlink:label="fig-0085-01a" xlink:href="fig-0085-01"/>
            a x d interiecta,
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            ac media, quæ li
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            neæ ψ ſit æqua-
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            lis; </s>
            <s xml:space="preserve">ſecetq; </s>
            <s xml:space="preserve">reli-
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            quã coni ſectio
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            nem in pun cto
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            h; </s>
            <s xml:space="preserve">& </s>
            <s xml:space="preserve">rectam li-
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            neam r g in u.
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            </s>
            <s xml:space="preserve">demõſtrabitur
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              <anchor type="note" xlink:label="note-0085-02a" xlink:href="note-0085-02"/>
            m h dupla ip-
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            ſius h n, ſicuti
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            demonſtratum
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            eſt o g ipſius g x
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            duplam eſſe. </s>
            <s xml:space="preserve">à
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            puncto autẽ m
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            ducatur m y contingens ſectionem a m q l in m: </s>
            <s xml:space="preserve">& </s>
            <s xml:space="preserve">m c a d
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            b d perpendicularis. </s>
            <s xml:space="preserve">poſtea ducta a n, & </s>
            <s xml:space="preserve">producta ad q li
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            neæ a n, n q inter ſe æquales erunt. </s>
            <s xml:space="preserve">quoniã enim in ſimi-
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              <anchor type="note" xlink:label="note-0085-03a" xlink:href="note-0085-03"/>
            libus portionibus a m q l, a x d ductæ ſunt à baſibus ad
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            portiones lineæ a q, a n, quæ æquales angulos continent
              <lb/>
            cum ipſis baſibus, eandem proportionem habebit q a ad
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            an, quam la ad a d. </s>
            <s xml:space="preserve">æqualis eſt ergo a n ipſi n q; </s>
            <s xml:space="preserve">& </s>
            <s xml:space="preserve">a q
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              <anchor type="note" xlink:label="note-0085-04a" xlink:href="note-0085-04"/>
            </s>
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