The Cost of Mining; An Exhibit of the Results of Important Mines Throughout the World
The Cost of Mining; An Exhibit of the Results of Important Mines Throughout the World
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— The figures given for the fiscal year ending April 30, 1903, also convey valuable information respecting the average metal contents of the ore smelted in the United States and Mexico. Proceeding still on the assumption that the total tonnage was 2,500,000, the average was 0.41 oz.
gold, 24.95 oz. silver, 197.4 lb. lead, and 19.17 lb. copper. The substantial accuracy of this deduction is confirmed by the report of the census for 1904. (The census confusingly designates the year as 1905, becaus...e its investigation was made at that time, but the investigation related to 1904.) According to the census, 302 THE COST OF MINING the amount of argentiferous ore treated in 1904 was 2,271,724 tons, which yielded an average of 0.42 oz. gold, 16.53 oz. silver, 198 lb. lead, and 22.72 lb. copper. It is to be remarked that the figures of the census relate only to ore smelted in the United States, while my previous figures have included the ore smelted both in the United States and in Mexico. Moreover, the latter figures are for contents of the ore purchased, while the census figures are for yield of the ore.
What to read after The Cost of Mining; An Exhibit of the Results of Important Mines Throughout the World?
You can find similar books in the "Read Also" column, or choose other free books by James Ralph Finlay to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
— The figures given for the fiscal year ending April 30, 1903, also convey valuable information respecting the average metal contents of the ore smelted in the United States and Mexico. Proceeding still on the assumption that the total tonnage was 2,500,000, the average was 0.41 oz.
gold, 24.95 oz. silver, 197.4 lb. lead, and 19.17 lb. copper. The substantial accuracy of this deduction is confirmed by the report of the census for 1904. (The census confusingly designates the year as 1905, becaus...e its investigation was made at that time, but the investigation related to 1904.) According to the census, 302 THE COST OF MINING the amount of argentiferous ore treated in 1904 was 2,271,724 tons, which yielded an average of 0.42 oz. gold, 16.53 oz. silver, 198 lb. lead, and 22.72 lb. copper. It is to be remarked that the figures of the census relate only to ore smelted in the United States, while my previous figures have included the ore smelted both in the United States and in Mexico. Moreover, the latter figures are for contents of the ore purchased, while the census figures are for yield of the ore.
What to read after The Cost of Mining; An Exhibit of the Results of Important Mines Throughout the World?
You can find similar books in the "Read Also" column, or choose other free books by James Ralph Finlay to read onlineMoreLess
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