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George Edward Kingsley
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16,374. Kingsley, G. E. Aug. 11. Sulphur is deposited in a process for treating complex sulphide and other ores containing galena with a dilute solution of nitric acid, preferably heated, of a strength not exceeding 7‹ BÚ.
GB190516374D1905-08-111905-08-11Improvement connected with the Treatment of Sulphide and other Ores.
ExpiredGB190516374A
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