analyses of other compounds, Proust obtained similar results.
For about eight years, Proust and Berthollet engaged in a friendly controversy over this issue, but, in the end, Proust was proved to be right. Berthollet had used impure reactants in his experiments, and thus he had analyzed the products inaccurately. Meanwhile, John Dalton had been formulating his atomic theory which was published in 1808. In this theory, Dalton rephrased Proust's law, calling it the law of multiple proportions. Although it…
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