Abstract
IN a letter, under the above title, published in NATURE of October 14, Dr. Leigh Fermor dissents from the conclusion reached in my article of July 15 on munition metals that the enemy countries can produce sufficient manganese for their steel manufacture requirements without having recourse to imports, and gives it as his opinion that they are likely to be seriously hampered by a shortage of manganese ore as soon as their accumulated stocks have been used. His conclusions are as follows:—
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References
I am much obliged to Dr. Fermor for his explanation of the figures of American produrtion, which is perfectly correct, for the information he gives of the mineralogical composition of the Indian ores, and for pointing out my omission of the Brazdian manganese Ores.
Stahl und Eisen, July 23, 1914, pp. 1246â“1254. Other articles are published in âœGlückauf,â 1913.
In the above article ores containing more than 30 per cent. of manganese are regarded as âœmanganese ores,â while those containing both iron and manganese, the latter being present to the estent of anything between 2 and 30 per cent., are regarded as manganiferous iron ores. They contain technical values both in iron and manganese. The mineralogical concept of manganese and manganferous iron ores is different; but we are only concerned with the metallurgical use of the terms.
This is rather less than the mean value, but the estimate is purposely made conservative.
Dr. Fermor gives this as 19.29 million tons in his first table, but this is the total iron production.
Bureau of Mines, U S.A., Bulletin pp. 245â“46.
âDie Eisen industrie im ersten Kriegs Jahr,â pp. 798â“800.
Stahl und Eisen, 1914, pp. 818â“19.
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CARPENTER, H. The Manganese Ore Requirements of Germany . Nature 96, 256–259 (1915). https://doi.org/10.1038/096256d0
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DOI: https://doi.org/10.1038/096256d0
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