Bernstein, Aaron, Naturwissenschaftliche Volksbücher, Bd. 1/5, 1897

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        <div xml:id="echoid-div222" type="section" level="1" n="169">
          <p>
            <s xml:id="echoid-s5879" xml:space="preserve">
              <pb o="23" file="435" n="435"/>
            leichter, der andere ſchwerer. </s>
            <s xml:id="echoid-s5880" xml:space="preserve">Die leichter verbrennenden er-
              <lb/>
            zeugen ein helleres Licht, als diejenigen, welche ſich ſchwerer
              <lb/>
            mit Sauerſtoff verbinden. </s>
            <s xml:id="echoid-s5881" xml:space="preserve">So geben z. </s>
            <s xml:id="echoid-s5882" xml:space="preserve">B. </s>
            <s xml:id="echoid-s5883" xml:space="preserve">Kohlenſpitzen ein
              <lb/>
            beſſeres Licht, als Eiſen, und
              <lb/>
              <figure xlink:label="fig-435-01" xlink:href="fig-435-01a" number="75">
                <caption xml:id="echoid-caption68" xml:space="preserve">
                  <emph style="bf">Fig. 5.</emph>
                  <lb/>
                Die beiden Kohlenſpitzen einer elek-
                  <lb/>
                triſchen Lampe in Thätigkeit.</caption>
              </figure>
            Eiſenſpitzen leuchten heller, als
              <lb/>
            ſolche aus Platinmetall.</s>
            <s xml:id="echoid-s5884" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5885" xml:space="preserve">Das jedoch, was man ge-
              <lb/>
            meinhin das elektriſche Licht
              <lb/>
            nennt, wird durch eine beſondere
              <lb/>
            Einrichtung hervorgebracht, die
              <lb/>
              <emph style="sp">von Davy</emph>
            (1778—1829) erfun-
              <lb/>
            den worden iſt. </s>
            <s xml:id="echoid-s5886" xml:space="preserve">Dieſer um die ge-
              <lb/>
            ſamte Naturwiſſenſchaft hochver-
              <lb/>
            diente Forſcher brachte an dem
              <lb/>
            poſitiven und negativen Pol einer
              <lb/>
            ſtarken Säule zwei Kohlenſpitzen
              <lb/>
            an. </s>
            <s xml:id="echoid-s5887" xml:space="preserve">Die Drähte mit den Kohlen-
              <lb/>
            ſpitzen an den Enden führte er
              <lb/>
            in einen Glasballon, der luft-
              <lb/>
            leer gemacht wurde, und nach-
              <lb/>
            dem er die Kohlenſpitzen von
              <lb/>
            den entgegengeſetzten Seiten her
              <lb/>
            durch Schrauben einander bis
              <lb/>
            zur Berührung näherte, ſo daß
              <lb/>
            der elektriſche Strom genötigt
              <lb/>
            war, durch die Kohlenſpitzen
              <lb/>
            hindurch zu gehen, zeigte ſich
              <lb/>
            eine Glüherſcheinung an den
              <lb/>
            Kohlen in ſo außerordentlichem
              <lb/>
            Grade, daß die Spitzen der Kohlen das blendendſte Licht von
              <lb/>
            ſich gaben, das man bisher künſtlich erzeugen konnte (Fig. </s>
            <s xml:id="echoid-s5888" xml:space="preserve">5).</s>
            <s xml:id="echoid-s5889" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5890" xml:space="preserve">Auf dieſem Verſuch baſiert, wie wir gleich ſehen werden,
              <lb/>
            unſere ganze elektriſche Beleuchtung, die ſich in wenigen </s>
          </p>
        </div>
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