Daniel Cowan Jackling

Daniel Cowan Jackling (born Aug. 14, 1869, Appleton City, Mo., U.S.—died March 13, 1956, San Francisco, Calif.) was an American mining engineer and metallurgist who developed methods for profitable exploitation of low-grade porphyry copper ores and thus revolutionized copper mining. In particular, Jackling opened the famed Bingham Canyon copper mine in Utah. Jackling typifies America’s favourite story—that of a poor boy who becomes an industrial giant. Orphaned at age two, he spent most of his...