The analysis of fuel, gas, water, and lubricants . ingcalculated to the fully oxygenated or inert basis, furnish avery pronounced influence upon the calorific value of the purecoal or Unit material. This basis of classification is madeuse of in the discussion and references which follow. By computing the heat values as derived by this formula forsolid fuels throughout the United States, as published by theUnited States Geological Survey, the Ohio State Survey, andthe Illinois Geological Survey, we have in tabular form, givingthe extremes for each general fuel type, the following: Table VI.—Cla
The analysis of fuel, gas, water, and lubricants . ingcalculated to the fully oxygenated or inert basis, furnish avery pronounced influence upon the calorific value of the purecoal or Unit material. This basis of classification is madeuse of in the discussion and references which follow. By computing the heat values as derived by this formula forsolid fuels throughout the United States, as published by theUnited States Geological Survey, the Ohio State Survey, andthe Illinois Geological Survey, we have in tabular form, givingthe extremes for each general fuel type, the following: Table VI.—Classification of Fuel Types by Heat Values for UnitCoal or Actual Organic Substance B. T. u. Cellulose and wood 7, 500 to 8,500 Peat 7,800 to 11,500 Lignite, brown 11,500 to 13,000 Lignite, black, or subbituminous coal ,000 to 14,000 Bituminous coal (mid-continental field) 14,000 to 15,000 Bituminous coal (eastern field) 15,000 to 16,000 Semi-anthracite and semi-bituminous 15,500 to 16,000 Anthracite 15,000 to CLASSIFICATION OF COALS 55. 56 FUEL, GAS, WATER AND LUBRICATION This study has been carried still further by the Illinois StateGeological Survey, and the extremes have been derived for thevarious seams as worked throughout the coal area of the state. It is to be recalled that the geologists recognize 16 coal seamsfor Illinois, counting from the bottom of the coal measuresupward. Only seven of these seams are of workable numbering 1 to 7 follows the geological order, and not thatused in some localities, as at La Salle, Bloomington, etc., wherethe number of the seam is that which resulted from the order oftheir development from the surface downward. Composition of Illinois Coals.—A recent survey carried on bythe Illinois State Geological Survey in cooperation with theU. S. Bureau of Mines covered all of the coal producing countiesof Illinois and included something over 100 mines. The analyti-cal values for the coals from these mines have been avera
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectchemist, bookyear1922
