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 cost average price bituminous Broken Hill bullion Butte calculate Calumet & Hecla capital cents per pound charges coal Coeur d'Alene coke concentrates construction Copper Company copper mines cost of mining Cripple Creek cyaniding December 31 deductions deposits depreciation district equal 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 costs 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 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 24 - In cither case there is to be taken into consideration, in addition to the cost of marketing, the success achieved in disposing of satisfactory quantities of the product. It is in this respect particularly that the cost of mining may be greatly influenced by this factor in determining the volume of operations.
Page 27 - ... 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. This is an example that has been worked out in practice.
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 27 - A false economy often results from mining too much in a mere attempt to produce a greater output than the development of the mine really warrants. This invariably results in mining waste at a dead loss, but as this loss is on the same basis as the above, there seems no need to follow the discussion further.4 Unit of cost.
Page 3 - Copper value at New York City pounds Lead, value at New York City .short tons Zinc value at New York City . do Quicksilver, value at San Francisco flasks..