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US1157153A
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Process for the industrial separation of lead and zinc contained in the state of sulfids in ores.
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GB191304246A
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Process for the Industrial Separation of Lead and Zinc Contained in the State of Sulphides in Ores.
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GB190916053A
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Improvements relating to the Dissolving of Impure Tin or Tin Alloys chiefly for Obtaining Tin or Tin Compounds.
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GB190609339A
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Improvements relating to the Treatment of Complex Sulphide Ores.
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US656497A
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Process of treating zinc-bearing complex ores for recovery of zinc or other metals therefrom.
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GB189908043A
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An Improved Method of Treating Complex Tin Ores.
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GB189903475A
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Improvements in and relating to the Production of Zinc Oxide.
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GB189823221A
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Improvements in the Treatment of Complex Ores.
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US652072A
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Treatment of ore.
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GB189800285A
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Improvements in the Treatment of Ores containing Intimately Mixed Copper, Zinc, and Lead.
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