Berzelius, Jöns Jakob, Essai sur la théorie des proportions chimiques et sur l' influence chimique de l' électricité

Table of Notes

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              <pb o="13" file="0033" n="33" rhead="DES PROPORTIONS CHIMIQUES."/>
            seule combinaison de deux substances, il la con-
              <lb/>
            sidère comme composée d’un atome de chacune.
              <lb/>
            </s>
            <s xml:id="echoid-s203" xml:space="preserve">Y en a-t-il plusieurs, il considère la première
              <lb/>
            comme composée, par exemple, de A + B, la
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            seconde de A + 2 B, la troisième de A + 3 B, etc. </s>
            <s xml:id="echoid-s204" xml:space="preserve">
              <lb/>
            Dans son nouveau système de chimie, Dalton
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            vient d’examiner les corps oxidés, et il indique le
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            nombre d’atomes qu’il suppose y être contenus. </s>
            <s xml:id="echoid-s205" xml:space="preserve">
              <lb/>
            Il paraît cependant que, dans ce travail, ce sa-
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            vant distingué s’est trop peu fondé sur l’expé-
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            rience; </s>
            <s xml:id="echoid-s206" xml:space="preserve">et peut-être n’a-t-il pas agi avec assez de
              <lb/>
            précaution en appliquant la nouvelle hypothèse
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            au système de la chimie. </s>
            <s xml:id="echoid-s207" xml:space="preserve">Il m’a semblé que dans
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            le petit nombre d’analyses qu’il a publiées, l’on
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            pouvait quelquefois s’apercevoir du désir de l’o-
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            pérateur d’obtenir un certain résultat; </s>
            <s xml:id="echoid-s208" xml:space="preserve">ce dont on
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            ne peut trop se garder, lorsqu’on cherche des
              <lb/>
            preuves pour ou contre une théorie dont on est
              <lb/>
            préoccupé. </s>
            <s xml:id="echoid-s209" xml:space="preserve">Néanmoins, c’est à Dalton qu’est dû
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            l’honneur de la découverte de cette partie des
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            proportions chimiques que nous appelons les
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            proportions multiples, qu’aucun de ses prédé-
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            cesseurs n’avait observées. </s>
            <s xml:id="echoid-s210" xml:space="preserve">Elles font, pour ainsi
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            dire, la base des proportions chimiques; </s>
            <s xml:id="echoid-s211" xml:space="preserve">mais
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            elles n’en constituent point toute la théorie, et
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            ne suffisent pas pour déterminer les phénomènes
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            des proportions chimiques, tels que nous les
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            avons observés, comme on le verra plus bas. </s>
            <s xml:id="echoid-s212" xml:space="preserve">En
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            même temps que M. </s>
            <s xml:id="echoid-s213" xml:space="preserve">Dalton publiaitson </s>
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