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- Froth flotation and agglomerate tabling of micas
- Hard and soft kaolins of Georgia
- Concentration of bauxite for milling in the 50-ton Bureau of Mines Pilot Plant, Bauxite, Arkansas
- Concentration of fluorite from Metals Reserve Company stock piles
- Laboratory beneficiation of disseminated fluorspar ores
- Mississippi Valley Experiment Station Laboratory and pilot-plant concentration of corundum from Gallatin Gateway, Mont., for World War II
- Celestite deposits, Brown, Nolan, Fisher, and Coke Counties, Tex.
- Flotation of beryllium ores