Keywords: history of technology historyoftechnology mining smithsonian probably public domain probablypublicdomain blackandwhite monochrome black and white SI Neg. CCC-2929. Date: 8/18/1930....Model Room Mine 204.Model Room at 201 Mine.From the Consolidation Coal Company collection, National Museum of American History...Credit: unknown (Smithsonian Institution) SI Neg. CCC-2929. Date: 8/18/1930....Model Room Mine 204.Model Room at 201 Mine.From the Consolidation Coal Company collection, National Museum of American History...Credit: unknown (Smithsonian Institution) |