The Cost of Mining: An Exhibit of the Results of Important Mines Throughout the World |
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15 cents amortization amount amygdaloid annual anthracite approximately Arizona assay average price bituminous Broken Hill bullion Butte calculate Calumet & Hecla capital cents per pound charges coal coke concentrates construction Copper Company copper mines cost of mining cost per ton Cripple Creek cyaniding December 31 deductions deposits depreciation district dividends estimate expenditures expense extraction factors figures fissures follows freight grade Guanajuato hoisted increased invested Kalgoorlie labor Lake Superior lead limestone long tons losses marketing ment Mesabi range metal methods mineral mining and milling MINING COMPANY mining cost Moonta operating cost orebodies ounce output period pig iron plant probably production profit pyrite railroad reports rock sale of copper seam shaft shipped short tons silver smelter smelting stamped statement steam shovel Steel Corporation stopes supplies surface thick timber tion tonnage total cost transportation treatment underground Utah vein wages Wallaroo Wolverine yield zinc
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Page 46 - What is the interest of $ 81, for 2 years 14 days, at £ per cent. ? £ per cent. ? £ per cent. ? 2 per cent. ? 3 per cent. ? 4£ per cent. ? 5 per cent. ? 6 per cent. ? 7 per cent. ? 7£ per cent. ? 8 per cent.
Page 54 - Up to the close of 1865 the total production had amounted to 284,890,055 tons. In the decade from 1866 to 1875, inclusive, the production amounted to 419,425,104 tons, making the total production up to the close of 1875, 704,315,159 tons. In the following decade, from 1876 to 1885, inclusive, the production amounted to 847,760,319 tons, something more than double the total production up to the beginning of that tfecade.
Page 23 - Transportation is in very many cases one of the most vital elements in the cost of mining. This is particularly the case when the products have to be shipped considerable distances. In the case of coal and iron it is a matter of common knowledge that transportation is often the allimportant factor, and even in the case of precious metals sometimes the cost of transporation to mills and smelters equals, if it does not exceed, the cost of actual mining.
Page 54 - This great increase in the production of coal, when considered with the increase in the population, furnishes some further interesting comparisons. Going back for a period of a little over 50 years, or to the middle of the last century, and comparing the statistics of coal production with the increased population, it is found that in 1850, according to the United States census for that year, the production of coal amounted to 6,445,681 tons, when the population of the country amounted to 23,191,876...
Page 54 - Going back for a period of a little over 50 years, or to the middle of the last century, and comparing the statistics of coal production with the increased population, it is found that in 1850, according to the United States census for that year, the production of coal amounted to 6,445,681 tons, when the population of the country amounted to 23,191,876 persons. The per capita production of coal in that year is thus seen to have been 0.278 ton. In 1860, or...
Page 27 - In other words, the gross receipts in this case have fallen $12,500. The cost of mining per ton is more than twice as great; the cost for freight and treatment per ton is $3 greater. The apparent showing by the superintendent is very bad; but nevertheless he has made for the company $11,250 clear profit on the transaction. " In the first case our total cost for mining, freight, and treatment is only $11.25 per ton; in the second case it is $17.75 per ton, but there is more money in the higher cost....
Page 8 - At first thought one is apt to assume that with costs the same the company would receive no profit unless the prices were above 4.43 cents for lead and 51.95 cents for silver. How false such an assumption would be appears from the following : "The...
Page 81 - GENERAL. The influencing conditions causing the great losses that are at present incurred are : 1. Cheapness of "coal in place ;" that is, in the seam. 2. Low market prices, resulting from extreme competition. 3. Character of the seam, roof, and floor as determining the method of mining. 4. Surface-subsidence due to mining. 5. Interlaced boundary ownerships. 6. Carelessness in mining operations. The first two factors, taken together, are the controlling ones in most mining operations in influencing...
Page 91 - Plants for transportation of iron ore 115,000,000 Coal, coke, and quarry plants 35,000,000 Docks and dock equipment 20,000,000 Blast furnaces 110,000,000 Total fixed capital $330,000,000 Working capital in inventory and surplus 95,000,000 Total capital $425,000,000 It is to be noted that this estimate does not include the purchase price of lands or good-will, but only such capital as would be required if the opportunity to conduct this business were a free gift.
Page 81 - X \ .90 .80 .50 should be wisely handled. This is a fact that has been recognized by many governments from the earliest times, and the policy of treating mining rights as public rather than as private property has been adopted by probably the greater number of nations. These ideas have been so widely discussed that they are already known to the majority of people, and I wish to call attention only to some considerations that may have a practical value. CAUSES OF WASTE IN COAL MINING An interesting...