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In the present paper, we study the discovery of the chemical element number 23, Erythronium/Vanadium (E/V), as an early example of the modern process of validating knowledge claims in México. We examined the published work between 1802 and 1832 of Andrés Manuel del Río (AMR) in the Royal Mining Seminar of México and contrasted the styles of argument and forms of certification between his teaching...
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