Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 115
No man worksunderground. It is an open mine, a mountain ofcopper ore, four miles around the base, andnearly two thousand feet high from base to sum-mit. On winding tracks gigantic steam-shovelstear into the rocks, the gravel, the ore, and dumptheir load on cars that take it to the crushingmills and… … A MOUNTAIN OF PORPHYRY COPPER ORE.There are twenty-seven terraces around the mountain, carrying tracks sixty miles in length. Sixty thousand tons of material are handled every day. The summit is nearly two thousand feet above the town of Bingham. clay; and at one point, midway in a region…
Children's literature
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