Browse TRAIL Inventories

Milling methods at the Midvale concentrator of the U.S. Smelting, Refining & Mining Co., Midvale, Utah

Milling methods and costs at the lead concentrator of the Hecla Mining Co., Gem, Idaho

Summary of ore-mining cost data

Lead and zinc mining and milling in the United States :current practices and costs

Mining and milling methods and costs at the Tennessee-Schuylkill Corporation mine, Chloride, Ariz.

Mining and benefication of Appalachian manganese ores

Directions for laboratory mineral sizing

Heavy liquids and procedures for laboratory separation of minerals

Quartzite mining and processing methods and costs at the Honey Brook, Pa., plant of George F. Pettinos, Inc.

Safe cleaning of State of Maine filters using EDTA-type chelating agents


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