COPPER RESOURCES OF JAPAN
1924 年 36 巻 4 号 p. en1-en5
詳細
1924 年 36 巻 4 号 p. en1-en5
The production of copper and copper ores in 1921 amounted 57, 597 metric tons and 1, 244, 657 tons respectively, as against 69, 346 tons and 1, 602, 582 to: is in 19-0, a decrease of 11, 749 tons of copper and 57, 925 tons of copper ores. Miues yielding above 250 tons of copper or 10, 000 tons of copper ores, the deposits of which are here to be considered, are shown in the following table, together with their outprits: (unit in metrictons).
