U.S. Government Printing Office, 1910

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Seite 31 - Mineralogy Simplified. Easy Methods of Identifying Minerals, including Ores, by Means of the Blow-pipe, by Flame Reactions, by Humid Chemical Analysis, and by Physical Tests. By...
Seite 2 - The former are determined by lines of levels run either in both forward and backward directions or by simultaneous double-rodded lines, a highgrade instrument being used and special precautions being taken in observations and reduction to correct errors and make the line continuously good throughout. The latter or primary levels are determined with the Y level, precautions being taken against only the principal errors and the levels being run...
Seite 33 - A handbook on the minerals and mineral resources of Virginia. Prepared for the Virginia Commission to the St. Louis Exposition.
Seite 35 - Smithsonian exploration in Alaska in 1907 in search of Pleistocene fossil vertebrates.
Seite 16 - December, 1907, being an account of mining operations for gold, coal, etc., in the Province of British Columbia.
Seite 32 - Southern extension of the Kootenai and Montana coal-bearing formations in northern Montana.
Seite 14 - Gray, compact limestone; lighter in color than the Hamburg limestone, traversed with thin seams of calcite; bedding planes very imperfect. Prospect Mountain quartzite. 1,500 Bedded brownish-white quartzites, weathering dark brown; ferruginous near the base; intercalated thin layers of arenaceous shales; beds whiter near the summit. reconnaissance. Devonian fossils have been described0 from several places in the Pinyon Range, among them Chimney station, Hot Spring Creek, and Pinyon Pass.
Seite 75 - The localization of values in ore bodies and the occurrence of shoots in metalliferous deposits; ore shoots at Butte, Montana: Econ.
Seite 20 - ... the evidence furnished by vertebrate fossils of age of certain so-called Permian beds in America. — Jour.
Seite 3 - Chicago, 111. British Columbia, Bureau of Mines: Annual Report of the Minister of Mines for 1907.

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