The book Centennial History of Illinois volume V4 was written by author Illinois Centennial Commission Here you can read free online of Centennial History of Illinois volume V4 book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Centennial History of Illinois volume V4 a good or bad book?
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Proper organization or consolidation could of course partly remedy such difficulties, but to a certain extent they are unavoidable, as Illinois coal stocks very poorly and therefore labor rates must be high to cover the consequent period of summer idleness even though mines be reduced to a number conducive to efficiency. All these conditions have led to a steady decline in the margin of profit, a feature that 17 For table see appendix, p. 512, columns i, 2, 3, 7, 8, 9, 10. 18 Rice, " Mining Was...tes and Mining Costs in Illinois, " in Illinois State Geological Survey, Bulletin 14, p. 212 ff. MINERAL WEALTH 425 is injurious to the interests of both producer and consumer when it is carried too far. 19 In spite of the hindrance of excessive competition, there are numerous examples of increasing efficiency in the coal indus- try of Illinois. Since 1900 there has been a notable increase in the number of mines using machines, and in the number of machines in use in each mine. This has resulted in a fourfold increase in tonnage for mines so equipped as compared with a twofold increase for all other mines during the past seventeen years.
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