Born-Digital or AnalogAnalogTranscriptMines & mineral resources, Colorado. Idaho Springs district. Activities; mines; list. R. M. News. Oct. 2, 1880 p.3 c.3 Miner uses magnet to locate hidden minerals. R. JA."News. Oct. 7, 1880 p.3 c.2 German discovers gold magnet. R. 1.1. News. Oct. 10, 1880 p.2 c.3 Attempt made to jump Great eastern mine. R. M. News. Oct. 12, 1880 p.3 c.l Activities, districts; list. R. 11. News. Apr. 1, 1883 p.6 c.4CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
