Born-Digital or AnalogAnalogTranscriptReese and company Amalgamate & roast first galena ore, Colorado R. M. News. Apr. 29, 1867 p.4 c.3 Ore treating process tests, Black Hawk district Colo. R. M. News. May 10, 1867 p.1 c.3 Smelter process termed German results, Gilpin county R. M. News. May 25, 1867 p.1 c.5 German furnace erected to reduce Baker lode ore, Georgetown dist. Colo. R. M. News. May 27, 1867 p.4 c.3 Smelting process trials successful, Colo. R. M. News. June 17, 1867 p.1 c.3CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
