Percentage of Extractions of Bituminous Coal With Special Reference to Illinois Conditions (Classic Reprint) - Hardcover

Inhaltsangabe

Excerpt from Percentage of Extractions of Bituminous Coal With Special Reference to Illinois Conditions

Most of the data presented were obtained from those Operating the mines, and represent, therefore, calculations or estimates based upon thorough familiarity with conditions. Some of the methods by which high extraction is attained in other districts are described with the hope that the coal producers of Illinois may find herein suggestions which will prove helpful in their efforts to attain higher recovery.

It has been impossible to include in a Single publication all the material available concerning the physical conditions encountered and the methods adopted in the various coal fields, but there will be found in the bibliography a list of books and articles in which these subjects are covered in greater detail. It is the present pur pose to begin at an early date a more extended investigation of the plans and dimensions of mine workings in Illinois with reference to the cost of production and the percentage of extraction.

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