Flotation of Idaho ores
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Clarence A. Wright
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Article
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1921
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Elsevier Science
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English
โ 47 KB
THE output of oil and gas in the United States is steadily declining. Coincident with this decline is a steadily increasing demand for petroleum and its products, and at present there are no commercial substitutes for lubricating oil. In order to obtain the highest efficiency in the production of oi