By H. B. Layton (1900) – The development of the great Pilares copper mine, Nacozari, in Sonora, Mexico, and the construction of big concentrating, smelting and converting plants have been accomplished under conditions which, considering the size of the undertaking, would have been prohibitive to less determined operators. The owner of the property is the … Sigue leyendo The Nacozari Mines, Mexico (1900)