Abstract
The mineralogical composition of Fe bog ores has been examined. Differential thermal analysis revealed an endothermic reaction much lower than that of both lepidocrocite and goethite, but X-ray analysis gave the pattern of goethite. The Mn bog ores were shown by the aid of differential thermal analysis to consist of hydrated compounds. X-ray analysis revealed the presence of delta-MnO2, and of manganous manganite in one sample.

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