CHAPTER XX

THE MEXICO OF SOUTH AMERICA

Depression and Revival of Mining Industry--Bolivia’s Tin Deposits and Their Extension--Oruro, Chorolque, Potosi, and La Paz Districts--Silver Regions--Potosi’s Output through the Centuries--Pulacayo’s Record--Mines at Great Heights--Trend of the Copper Veins--Corocoro a Lake Superior Region--Three Gold Districts--Bismuth and Borax--Bituminous Coal and Petroleum--Tropical Agriculture--Some Rubber Forests Left--Coffee for Export--Coca and Quinine--Cotton 313