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

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        <div xml:id="echoid-div524" type="section" level="1" n="203">
          <pb o="776" file="0520" n="542" rhead="CHRIST. HUG. EXPERIM. PHYSICA."/>
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        <div xml:id="echoid-div525" type="section" level="1" n="204">
          <head xml:id="echoid-head295" xml:space="preserve">EXPERIMENTUM VI.</head>
          <head xml:id="echoid-head296" style="it" xml:space="preserve">Effectus Siphonis in vacuo.</head>
          <p>
            <s xml:id="echoid-s10980" xml:space="preserve">NOtum eſt, effectum ſiphonis crurum inæqualium, quo
              <lb/>
            evacuatur aqua vaſis ſupra oram, non amplius tribui fugæ
              <lb/>
            vacui, ſed ponderi aëris, qui premendo in ſuperficiem aquæ
              <lb/>
            in vaſe, illam cogit ut in ſiphonem adſcendat, dum in alio
              <lb/>
            crure illa gravitate ſuâ deſcendit. </s>
            <s xml:id="echoid-s10981" xml:space="preserve">Inveni methodum qua effi-
              <lb/>
            ci, ut aqua e ſiphone fluxerit, poſtquam recipiens vacuum
              <lb/>
            erat aëre; </s>
            <s xml:id="echoid-s10982" xml:space="preserve">& </s>
            <s xml:id="echoid-s10983" xml:space="preserve">obſervavi effectum, ſi aqua purgata fuerit aëre,
              <lb/>
            eodem modo ac extra recipiens procedere.</s>
            <s xml:id="echoid-s10984" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s10985" xml:space="preserve">Breviſſimum ſiphonis crus erat octo pollicum & </s>
            <s xml:id="echoid-s10986" xml:space="preserve">apertura
              <lb/>
            duarum linearum. </s>
            <s xml:id="echoid-s10987" xml:space="preserve">Nec dubitari debet quin recipiens aëre
              <lb/>
            bene vacuum fuerit; </s>
            <s xml:id="echoid-s10988" xml:space="preserve">nam id poſſum affirmare, tum quoniam
              <lb/>
            nullum antliâ aërem ulterius extrahere potui, tum ob alia
              <lb/>
            ſigna certiora.</s>
            <s xml:id="echoid-s10989" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s10990" xml:space="preserve">Magis ergo confirmatur noſtra hypotheſis materiam da-
              <lb/>
            ri prementem aëre ſubtiliorem. </s>
            <s xml:id="echoid-s10991" xml:space="preserve">Si quis laborem in ſe ſuſcipere
              <lb/>
            vellet quærendi, quanta ſit vis hujus preſſionis quod melius
              <lb/>
            fieri non poteſt niſi proſequendo experimenta cum tubis
              <lb/>
            Mercurio plenis longioribus, quam quibus uſus eſt D
              <emph style="super">nus</emph>
            Boy-
              <lb/>
            le, inveniet forte, vim illam ſatis validam eſſe ad efficiendam
              <lb/>
            unionem partium vitri & </s>
            <s xml:id="echoid-s10992" xml:space="preserve">aliorum corporum, quæ nimis ar-
              <lb/>
            cte cohærent, quam ut juncta tantum forent per contiguitatem
              <lb/>
            & </s>
            <s xml:id="echoid-s10993" xml:space="preserve">quietem uti voluit Carteſius.</s>
            <s xml:id="echoid-s10994" xml:space="preserve"/>
          </p>
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        <div xml:id="echoid-div526" type="section" level="1" n="205">
          <head xml:id="echoid-head297" xml:space="preserve">FINIS.</head>
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