Keywords: history of technology historyoftechnology mining smithsonian probably public domain probablypublicdomain blackandwhite monochrome landscape black and white SI Neg. CCC-2544. Date: 3/6/24....Proper Method of Shooting Coal.From the Consolidation Coal Company collection, National Museum of American History...Credit: unknown (Smithsonian Institution) SI Neg. CCC-2544. Date: 3/6/24....Proper Method of Shooting Coal.From the Consolidation Coal Company collection, National Museum of American History...Credit: unknown (Smithsonian Institution) |