Table 43 (p. 243) gives data concerning these American-owned mines. These three mines are allied to the “porphyries” of the United States in character, but they are less profitable because the external conditions make operation more difficult. TABLE 42.--CHIEF COPPER PRODUCERS OF CHILE. THEIR OWNERSHIP AND RELATIVE IMPORTANCE -------+---------------------------+------------+-----------------+ Con- | | Plant | | trolled| | capacity, | | by | | 1918 | | capital| | (pounds | Nature of | of | Company | a year) | product | -------+---------------------------+------------+-----------------+ United | Chile Copper Co. |120,000,000 |Refined copper | States | | | | | | | | Do | Braden Copper Co. | 72,000,000 |Blister copper | | | | | Do | A. S. & R. Co. | 24,000,000 |Blister copper | | | |and matte | | | | | Do | A. S. & R. Co., custom | | | | smelters | 24,000,000 | | | +------------+ | |Total United States |240,000,000 | | | | | | | United States properties’| | | | reserves | 150 years | | -------+---------------------------+------------+-----------------+ England| Central Chile Co. | 6,000,000 |Matte | | | | | Do | Poderosa mine | 2,000,000 |Ore (rich) | | | | | Do | Lota custom smelter | 8,000,000 |Blister | | | | | | +------------+ | |Total British | 16,000,000 | | | | | | | British properties’ | | | | reserves | 3 years | | -------+---------------------------+------------+-----------------+ France | Chanaral | 15,000,000 |Blister and matte| | | | | Do | Naltagua | 10,000,000 |Blister |