The Philippine journal of science . ; 03 5 Westwaldsend (1908)-- 6,983 6,875 6 Westwaldsend (1907) >? _ 2,56 6,472 6,650 7 Westwaldsend (1908) „ 6,835 6,920 8 New Westwaldsend(1907). 9,70 6,906 6,825 9 lUawarra near Sydncy. 7,624 7,600 10 Lichzow Valley (1908). 0,58 6,987 6,770 Selected lump. *? Double screened and picked twice. We would anticipate that the Goutal formula using the values of agiven above, is appli
The Philippine journal of science . ; 03 5 Westwaldsend (1908)-- 6,983 6,875 6 Westwaldsend (1907) >? _ 2,56 6,472 6,650 7 Westwaldsend (1908) „ 6,835 6,920 8 New Westwaldsend(1907). 9,70 6,906 6,825 9 lUawarra near Sydncy. 7,624 7,600 10 Lichzow Valley (1908). 0,58 6,987 6,770 Selected lump. *? Double screened and picked twice. We would anticipate that the Goutal formula using the values of agiven above, is applicable to Australian coal, since the latter is of tliesame class as the 150 American coals from which the values werecalculated. I have devised a chart (fig. 1) which is generally applicable to coals ofthis class, by means of which the same results may be obtained and theformula and laborious process of calculating entirely dispensed with. ^Analyses made by the official method {Joiini. Am. Chem. Soc. (1899). 21,1116). 180 CALORIFIC VALIE OF PHILIPPINE COALS. 181 This chart has heen drawn on the basis of the Goiital formula withmy values for a given on page IT9, and from it the approximatecalorifie value of the coal may be found, when the proximate analysisas made by the official method is known. The procedure is as follows: Find from the analysis the percentage of volatile combustible matter in the pure coal | ^ m _l r p I Locate this value on the chart and follow the ordinate (vertical line), until it intersects the curve representing the volatilecombustible matter which agrees with the percentage determined in the analysis;continue from this point along the abscissa (horizontal line), until the curverepresenting the percentage of fixed carbon of the analysis is reached; continuedoivnward on the ordinate to the base line where the calorifie value of the coalmay be directly read. Example: Analysis of the coal. Constituent. Per cent. Water Volatile combustible matter
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1906
