Huygens, Christiaan, Christiani Hugenii opera varia; Bd. 2: Opera geometrica. Opera astronomica. Varia de optica

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          <pb file="0015" n="15"/>
          <figure number="3">
            <image file="0015-01" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/0015-01"/>
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        <div xml:id="echoid-div9" type="section" level="1" n="9">
          <head xml:id="echoid-head16" xml:space="preserve">
            <emph style="bf">CHRISTIANI HUGENII,</emph>
            <lb/>
            <emph style="sc">Const</emph>
          . F.</head>
          <head xml:id="echoid-head17" xml:space="preserve">THEOREMATA
            <lb/>
          DE</head>
          <head xml:id="echoid-head18" xml:space="preserve">
            <emph style="bf">QUADRATURA</emph>
          </head>
          <head xml:id="echoid-head19" xml:space="preserve">HYPERBOLES, ELLIPSIS,
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          ET CIRCULI,
            <lb/>
          EX DATO</head>
          <head xml:id="echoid-head20" xml:space="preserve">PORTIONUM GRAVITATIS CENTRO</head>
          <head xml:id="echoid-head21" xml:space="preserve">
            <emph style="sc">Theorema</emph>
          I.</head>
          <p style="it">
            <s xml:id="echoid-s48" xml:space="preserve">POrtioni hyperboles, vel ellipſis vel
              <lb/>
            circuli portioni, dimidiâ ellipſi di-
              <lb/>
            midiove circulo non majori, circum-
              <lb/>
            ſcribi poteſt figura ex parallelo-
              <lb/>
            grammis æqualem latitudinem ha-
              <lb/>
            bentibus, quæ portionem excedat ſpatio quod minus
              <lb/>
            ſit quovis dato.</s>
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          </p>
          <p>
            <s xml:id="echoid-s50" xml:space="preserve">
              <emph style="sc">DAta</emph>
            ſit portio A B C, cujus diameter B D.
              <lb/>
            </s>
            <s xml:id="echoid-s51" xml:space="preserve">
              <note position="right" xlink:label="note-0015-01" xlink:href="note-0015-01a" xml:space="preserve">TAB. XXXIV.
                <lb/>
              Fig. 1.</note>
            Super baſin A C conſtituatur parallelogrammum
              <lb/>
            A E, latera duo habens diametro B D parallela
              <lb/>
            & </s>
            <s xml:id="echoid-s52" xml:space="preserve">æqualia, quo fiet ut latus reliquum portionem
              <lb/>
            in vertice contingat. </s>
            <s xml:id="echoid-s53" xml:space="preserve">Hoc parallelogrammo con-
              <lb/>
            tinuè in duo æqualia ſecto, relinquetur tandem pars </s>
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