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- Reduction of phosphorus content in iron ore and concentrate from Iron Mountain, Mo.
- Investigation of the Dempsey zinc-lead mine, Washington County, Mo.
- Laboratory concentration of complex sulfide-oxide ore from Shenandoah-Dives mine, Silverton, Colo.
- Pilot-plant concentration of Arkansas aluminum ores
- Investigation of concentration sections at the Central mill of the Eagle-Picher Mining & Smelting Co., Cardin, Okla.
- Metallurgical investigations of the recovery of zinc and iron sulfides from the Gray zinc-iron deposit, Galena, Ill.