Keywords: history of technology historyoftechnology mining smithsonian probably public domain probablypublicdomain blackandwhite monochrome outdoor vehicle black and white SI Neg. CCC-3196B. Date: 10/1937....Dumptors Van Lear slate disposal.Dumptor Mine 155 Van Lear, Oct. 1937.From the Consolidation Coal Company collection, National Museum of American History...Credit: unknown (Smithsonian Institution) SI Neg. CCC-3196B. Date: 10/1937....Dumptors Van Lear slate disposal.Dumptor Mine 155 Van Lear, Oct. 1937.From the Consolidation Coal Company collection, National Museum of American History...Credit: unknown (Smithsonian Institution) |