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acres Appanoose Appanoose county argillaceous average basins bituminous blue bluffs bogs boiler bottom bowlders brown brownish black C. A. White calcareous calculated on dried Carboniferous cent Cerro Gordo coal bed Coal Company coal horizons Coal Measures creek dark depth district dried coal drift drill feet A. T. feet deep feet in thickness feet thick fibrous Fire clay fissile four feet Gray shale hoisting holes inches thick Iowa coal Iowa Geol Jasper county light-colored located Louis limestone lower Mahaska county Marion county mile east mile south Moines river northeast operated Oskaloosa Ottumwa outcrops peat Polk county pounds producer prospecting railroad Rept roof Rush Rush sample Sandstone sandy shaft Skunk river slate slope Soapstone Soapstone shale southeast southwest steam strata surface Surv thin three feet tons Total township upper valley vein Webster county Whitebreast Winnebago workable
Page 286 - Cheer district has been the chief producer and it was- not until the beginning of the present century that its standing as a large mining field began to be seriously impaired.
Page 422 - SMOKE OBSERVATIONS. 77. Percentage of smoke as observed per cent. 78. Weight of soot per hour obtained from smoke meter ounces 79. Volume of soot per hour obtained from smoke meter cubic inches METHODS OF FIRING.
Page 422 - ... 73. Efficiency of boiler, including the grate ; heat absorbed by the boiler, per pound of dry coal, divided by the heat value of 1 pound of dry coal.
Page 429 - Water apparently evaporated under actual conditions per pound of coal as fired. (Item 57 -H Item 25.) Ib.
Page 139 - Norwoodville, a coal camp, is situated two miles due south of the Delaware mine. Mining has been carried on in a desultory fashion at this point for a number of years, but it was not until recently that the present large production was attained. The company now in charge of operations has met all difficulties in a determined and scientific manner. The Norwood-White shaft No. 1, commonly known as Klondike No. 1, lies on the north side of the Chicago Great Western tracks, near the camp (Delaware Tp.,...
Page 436 - HEAT BALANCE, OR DISTRIBUTION OF THE HEATING VALUE OF THE COMBUSTIBLE. Total Heat Value of 1 Ib. of Combustible. . , .BTU BTU Per Cent. 1. Heat absorbed by the boiler = evaporation from and at 212 degrees per pound of combustible x 965.7.
Page 481 - Moisture Per cent. Volatile matter Per cent. Fixed carbon Per cent. Ash Per cent. Sulphur Per cent.
Page 601 - All the critically importaiit exposures have been examined in company with Professor Calvin, and the correlations arrived at by stratigraphy in nearly all instances have been confirmed by paleontological evidence. AREA The area covered by this report includes the six counties, Adams, Montgomery, Mills, Fremont, Page, and Taylor, situated in the southwestern corner of the state. It is bounded on the south by the state of Missouri and on the west by the Missouri river. It extends east from the Missouri...
Page 430 - ... of the distribution of the heating value of the coal among the several items of heat utilized and heat lost may be included in the report of a test when analyses of the fuel and of the chimney gases have been made. It should be reported in the following form : HEAT BALANCE, OR DISTRIBUTION OF THE HEATING VALUE OF THE COMBUSTIBLE.