Keywords: history of technology historyoftechnology mining smithsonian probably public domain probablypublicdomain blackandwhite monochrome outdoor black and white SI Neg. CCC-1957. Date: 1921....210-11-12 Tipple Tracks.210-11-12 Tipple Tracks, left side .From the Consolidation Coal Company collection, National Museum of American History...Credit: unknown (Smithsonian Institution) SI Neg. CCC-1957. Date: 1921....210-11-12 Tipple Tracks.210-11-12 Tipple Tracks, left side .From the Consolidation Coal Company collection, National Museum of American History...Credit: unknown (Smithsonian Institution) |