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

Table of contents

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            zufrieden ſein. </s>
            <s xml:id="echoid-s5657" xml:space="preserve">— Nun aber gebe man acht, wie lange es
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            dauert, ehe die Stube vollkommen durchwärmt iſt, und zu
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            dieſem Zweck beobachte man das Thermometer am Fenſter.
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            </s>
            <s xml:id="echoid-s5658" xml:space="preserve">Findet ſich’s, daß drei Stunden nach der höchſten Hitze am Ofen
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            die Stube am heißeſten iſt, dann darf man auch mit dieſer ſich
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            zufrieden geben. </s>
            <s xml:id="echoid-s5659" xml:space="preserve">— Wirkt das Feuer auf den Ofen und dieſer
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            auf die Stube viel ſchneller, ſo iſt das ein ſchlimmes Zeichen,
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            und der Ofen muß anders behandelt werden. </s>
            <s xml:id="echoid-s5660" xml:space="preserve">Dauert aber
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            beides länger, iſt erſt vier Stunden nach dem Einheizen
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            des Ofens dieſer am heißeſten, und ſteigt dann wieder die
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            Heizung der Stube in gleicher Zeit, ſo gehört dies ſchon zu
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            den außerordentlich günſtigen Fällen, und iſt ein Zeugnis, daß
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            nicht nur Ofen und Stube gut ſind, ſondern auch die Art des
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            Heizens am richtigſten iſt.</s>
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        <div xml:id="echoid-div153" type="section" level="1" n="139">
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            <emph style="bf">XXXIII. Der zu ſchnell heizende Ofen.</emph>
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            <s xml:id="echoid-s5662" xml:space="preserve">Durch die zwei Thermometer, die wir zur Probe des Ofens
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            und der Stube benutzt haben, erfahren wir freilich nur, wie
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            lange es dauert, bis der Ofen am heißeſten, die Stube am
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            wärmſten geworden; </s>
            <s xml:id="echoid-s5663" xml:space="preserve">und dies giebt an ſich noch keinen Maß-
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            ſtab zur ſichern Beurteilung der angewandten Heizart. </s>
            <s xml:id="echoid-s5664" xml:space="preserve">Wollte
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            man die Unterſuchung gründlich führen, ſo müßte man noch
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            zwei Thermometer anwenden, das eine, ein Metallthermometer,
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            müßte man in dem Ofen, das andere draußen auf der Straße
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            anbringen. </s>
            <s xml:id="echoid-s5665" xml:space="preserve">— Man würde dann ſehen, wann die Hitze im
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            Innern des Ofens am größten, und wie hoch ſie dann war;
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            </s>
            <s xml:id="echoid-s5666" xml:space="preserve">man würde ferner wahrnehmen, wie viel von dieſer Hitze dem
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            Ofen mitgeteilt wurde und wie viel davon verloren ging, ohne
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            der Stube zu gute zu kommen. </s>
            <s xml:id="echoid-s5667" xml:space="preserve">Würde man hierzu noch den
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            Wärmegrad der Stube mit dem, der draußen auf der </s>
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