Bernstein, Aaron, Naturwissenschaftliche Volksbücher, Bd. 12-16, 1897

Table of Notes

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          <p>
            <s xml:id="echoid-s3888" xml:space="preserve">
              <pb o="28" file="0296" n="296"/>
            machen. </s>
            <s xml:id="echoid-s3889" xml:space="preserve">Man ſchneidet eiu Brettchen oder einen recht breiten
              <lb/>
            Kork in der Größe eines ſilbernen Fünfmarkſtückes und legt
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            darauf ein Stück Fenſterſchwamm, der mit gutem Spiritus
              <lb/>
            angefeuchtet wird. </s>
            <s xml:id="echoid-s3890" xml:space="preserve">Dies läßt man auf einem Teller, der zur
              <lb/>
            Hälfte mit Waſſer angefüllt iſt, ſchwimmen und zündet den
              <lb/>
            Spiritus an. </s>
            <s xml:id="echoid-s3891" xml:space="preserve">Sodann ſtülpt man darüber ein gewöhnliches
              <lb/>
            leeres Bierglas. </s>
            <s xml:id="echoid-s3892" xml:space="preserve">Man wird nun ſofort gewahr, daß ein Teil
              <lb/>
            des Waſſers in das Glas hinaufſteigt und endlich die Flamme
              <lb/>
            des Spiritus erliſcht. </s>
            <s xml:id="echoid-s3893" xml:space="preserve">Der Grund dieſer Erſcheinung beſteht
              <lb/>
            darin, daß der Sauerſtoff der Luft, welcher ſich im Glaſe be-
              <lb/>
            funden hat, eine Verbindung mit dem brennbaren Waſſerſtoff
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            des Spiritus eingegangen iſt. </s>
            <s xml:id="echoid-s3894" xml:space="preserve">Der Sauerſtoff, der den fünften
              <lb/>
            Teil der Luft ausmacht, iſt demnach ausgeſchieden. </s>
            <s xml:id="echoid-s3895" xml:space="preserve">Im Glaſe be-
              <lb/>
            ſteht faſt nur noch der Stickſtoff, welcher vier Teile des Raumes
              <lb/>
            einnimmt. </s>
            <s xml:id="echoid-s3896" xml:space="preserve">Ein Fünftel des Raumes wird von dem einge-
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            ſtiegenen Waſſer eingenommen. </s>
            <s xml:id="echoid-s3897" xml:space="preserve">— Man kann dasſelbe Kunſt-
              <lb/>
            ſtück auch mit einem brennenden Fidibus machen, weil bei der
              <lb/>
            Verbrennung des Papiers ebenfalls der Sauerſtoff aufgezehrt
              <lb/>
            wird. </s>
            <s xml:id="echoid-s3898" xml:space="preserve">Der im Glaſe befindliche Stickſtoff iſt indeſſen nicht
              <lb/>
            ganz rein, da die Atmoſphäre auch noch andre Stoffe als Stick-
              <lb/>
            ſtoff und Sauerſtoff in minimaler Menge enthält. </s>
            <s xml:id="echoid-s3899" xml:space="preserve">— Will man
              <lb/>
            reinen Stickſtoff erhalten, ſo muß man zu einem andern Mittel
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            Zuflucht nehmen.</s>
            <s xml:id="echoid-s3900" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3901" xml:space="preserve">Man legt auf das Brettchen oder den Kork ein Stückchen
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            Phosphor, zündet dasſelbe an und ſtülpt das Glas darüber.
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            </s>
            <s xml:id="echoid-s3902" xml:space="preserve">Bei der Verbrennung des Phosphors entſteht Phosphor-
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            ſäure, die ſich als weißer Nebeldampf bemerkbar macht. </s>
            <s xml:id="echoid-s3903" xml:space="preserve">
              <lb/>
            Das aufſteigende Waſſer hat indeſſen eine ſtarke Neigung,
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            die Phosphorſäure aufzunehmen. </s>
            <s xml:id="echoid-s3904" xml:space="preserve">Nach einer Weile ver-
              <lb/>
            ſchwinden die Nebeldämpfe, und im Glaſe bleibt reiner Stick-
              <lb/>
            ſtoff übrig.</s>
            <s xml:id="echoid-s3905" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3906" xml:space="preserve">Stickſtoff beſitzt faſt gar keine Verbindungsluſt. </s>
            <s xml:id="echoid-s3907" xml:space="preserve">Man muß
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            ihm durch beſondere Kunſtſtücke im Moment ſeines </s>
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