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

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          <figure number="30">
            <image file="0061-01" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/0061-01"/>
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          <head xml:id="echoid-head42" xml:space="preserve">PRÆFATIO.</head>
          <p style="it">
            <s xml:id="echoid-s1100" xml:space="preserve">CIrca antiquum Tetragoniſmiproble-
              <lb/>
            ma, quo vel apud Mathematum ig-
              <lb/>
            naros nihil eſt celebrius, recens ope-
              <lb/>
            ræ pretium nos feciſſe rati, & </s>
            <s xml:id="echoid-s1101" xml:space="preserve">quæ-
              <lb/>
            dam hactenus compertis meliora ut
              <lb/>
            putamus conſecuti, Geometris ea de-
              <lb/>
            monſtrata impertiri volumus. </s>
            <s xml:id="echoid-s1102" xml:space="preserve">Nam-
              <lb/>
            que & </s>
            <s xml:id="echoid-s1103" xml:space="preserve">ſtudiis eorum profutura arbitramur, & </s>
            <s xml:id="echoid-s1104" xml:space="preserve">no-
              <lb/>
            vitate ipſâ ad rerum abditarum inveſtigationem
              <lb/>
            incitamento futura, reputantibus in eo quoque ar-
              <lb/>
            gumento, ubi omnes pridem ſummâ contentione ver-
              <lb/>
            ſati ſint, aliqua ſuperfuiſſe haud indigna diligen-
              <lb/>
            tiæ præmia. </s>
            <s xml:id="echoid-s1105" xml:space="preserve">Plurimi quidem antehac inventæ Qua-
              <lb/>
            draturæ gloriam ſibi aſſerere conati ſunt, varia-
              <lb/>
            que ſubinde commenta protulere, falſis vera mi-
              <lb/>
            ſcentes. </s>
            <s xml:id="echoid-s1106" xml:space="preserve">Verum à peritioribus omnia veleverſa fuiſ-
              <lb/>
            ſe vel contempta ſcimus, neque aliud adhuc rece-
              <lb/>
            ptum, quo omnis circuli dimenſio niteretur, præ-
              <lb/>
            ter unum illud, majorem eſſe eum inſcripto ſibi
              <lb/>
            polygono, circumſcripto minorem. </s>
            <s xml:id="echoid-s1107" xml:space="preserve">Nos autem pro-
              <lb/>
            piorem determinationem nunc exhibemus oſtendi-
              <lb/>
            muſque, quod duobus ſumptis polygonis propor-
              <lb/>
            tione mediis inter inſcriptum circumſcriptum-
              <lb/>
            que ipſis ſimile, minoris eorum perimeter cir-
              <lb/>
            cumferentia circuli major exiſtit, reliquum </s>
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