Abstract
Large quantities of manganes in a state of fairly high purity (99.5–99.9%) have been generally available only since the first commercial production of the metal by an electrolytic method during the 1940s. Previously, it had been processed electrolytically by individuals on merely a laboratory scale, subsequent to the first successful experiments of Allmand and Campbell in 1923. For this reason, very few of the experiments carried out on the physical and other properties of manganese before the late 1940s were made on metal that for research purposes may now be termed high-purity.
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