Bulletin - United States Geological Survey, Ausgabe 356

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The Survey., 1909
 

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Seite 33 - ... Mr. WH Weed and the last by Prof. Lester F. Ward, from a number of localities in Cascade County, Montana, largely in the vicinity of the stage station of Geyser and about forty miles southeast of Great Falls. These were turned over to Professor Fontaine for elaboration, and his report is published in Ward's second paper on the "Status of the Mesozoic Floras of the United States...
Seite 63 - Of 2,000 tons of the mine-product, which is daily dumped into the breaker, 200 tons of the various impurities are removed, and these impurities do not contain on an average over 1 per cent, of coal. The mixed coal is used by the railroads as a...
Seite 79 - ... the floor so as to catch the particles of coal as they are cut and to keep out impurities and excessive moisture where the floor is wet. Such a cloth should be about 1 J by 2 yards in size and spread so as to catch all the material composing the sample.
Seite 13 - Petrographic province of central Montana: Am. Jour. Sci., 4th ser., vol. 20, pp.
Seite 11 - Description of some fossil plants from the Great Falls coal field of Montana.
Seite 36 - Geology and paleontology of the Judith River beds: Bull. US Geol. Survey, No. 257, 1905, p.
Seite 63 - G, having continuous buckets 12 by 30 in., and speed of 50 buckets per minute, elevates the impurities into a bin X, from which it is loaded into a 6-ton car and hoisted by a pair of geared tail-rope engines, with 10- by 18-in.
Seite 62 - From the rollers the coal is elevated by a continuous elevator having buckets with a capacity of 1 10 pounds of coal when level full, operated at a speed equivalent to 200 tons per hour. The capacity of the fine-coal elevator is 90 tons per hour, giving a combined elevating capacity of 290 tons per hour, or 2,900 tons per day of ten hours, an amount which, added to the slack separated out by the shaking screen, gives a total capacity of 3,200 tons per day. The coal raised by the elevators is evenly...
Seite 9 - ... Science Monthly, Vol. 28, pp. 466-74. R. On the methods of study of thunder-storms, Proceedings of the American Academy of Arts and Sciences, Vol. 21, pp. 336-47. S. Thunderstorms in New England in the summer of 1885, Proceedings of the American Academy of Arts and Sciences, Vol. 22, pp. 14—58. T. Relation of the coal of Montana to the older rocks, Tenth Census of the United States, 1880, Vol.
Seite 41 - ... Bench, extending south to Teton River, where it turns to the east and follows along the northern side of Teton Ridge to the vicinity of Dutton. From here it extends diagonally southeastward past Benton Lake, across Missouri River to Sand Coulee near Gerber station, where it makes a sharp bend eastward and continues thus past the head of Red Coulee, thence northeastward to Belt Creek, where it passes off the northeast margin of the area. Its location and extent, as worked out by Calhoun," are...

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