The mine fields of Peru, once famous for their production of gold and silver, never wholly neglected, were for a time less vigorously worked. In the days of the Spanish colonists gold and silver were the chief objects of acquisition, but lately these metals have seemed less fashionable than copper. The variety in Peru’s wealth in minerals is shown to some extent by a list of her production in 1917 in millions of pounds in round numbers: copper, 84; copper matte, 4.4; copper ore, 16.5; vanadium, 7; lead ore, 7.5; antimony ore, 3.75; silver ore, 1.76; tungsten, 1. Smaller quantities of other ores were produced: gold, 2000 pounds; sulphur, 120,000; metallic silver, 8000; silver concentrates, 700,000; precipitated silver, 10,000; lead bullion, 250,000; lead concentrates, 650,000; zinc ores, 640,000; lead slag, 177,000; copper cement, 145,000; molybdenum, 12,000; gold ores, 30,500. Many other minerals exist, not exported in large enough quantities to have been given in this list. =Copper.= Americans were slow to become interested in mining investments in South America as in commercial trade, but when assured of the success of the pioneer enterprise inaugurated at Cerro de Pasco by New York capitalists about 1900, others followed, and large sums have now been invested in several Republics. Silver was discovered at Cerro de Pasco in 1630 and $200,000,000 were produced in one century. Four hundred and fifty million ounces were obtained by hand labor, the ore being carried by llamas to primitive smelters. Little interest was taken in copper; only ore with 25-50 per cent of the metal was formerly exported. Here at Cerro, where is located, some say, the richest copper deposit in the world, the titanic forces of nature cast upward a wonderful mass of material, gold, silver, copper, etc. Here are great open pits several hundred feet deep, worked for centuries for silver.