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Keywords: Bretz, Kohinoor Mine, 1884.jpg en Underground photo of workplace Kohinoor Coal Mine PA ca 1884 Photo courtesy Smithsonian Institution http //www theatlantic com/technology/archive/2011/08/the-smithsonian-goes-deep-inside-an-old-pennsylvania-coal-mine/244045/ George Bretz ~ 1884 PD-old Mining in the 1880s Pennsylvania in the 1880s Schuylkill County Pennsylvania Files uploaded by PDTillman George Bretz |