Born-Digital or AnalogAnalogTranscriptMining. Hydraulic. Placer Nelson's goldwasher at work at the mines - (in California Illus. Harper's Weekly March 17, 1860 p.171-172 Sketch of miners in action. Campbell,'J. L. Idaho ...1864 (rare) P-32 Summit Co. placer grounds to be worked with energy. RMN May 11, 1898 p.7 c.2 For the first in Colorado dredges for placer mining will , be used in our streams. They will be placed in the Blue River Valley. Pine Cone May 28, 1898CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
