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Al2Os Alkalies Altered Analysis by George Analysis by W. F. associated Black Brown Bulletin 20 CaO MgO Charles Clarke and Schneider Colo Colorado County Creek Cross and Hillebrand crystals Described by Cross described in Bulletin determined Diller Discussed by Clarke district E. A. Schneider equivalent to F F. W. Clarke Fe2Os FeO MnO gabbro Geological Survey George Steiger Golden green Hillebrand and described Hillebrand in Bulletin Ignition Insoluble J. E. Whitfield Jour L. G. Eakins laboratories locality Mass massive material mica mineral MnO CaO MnO trace Mountain Pale Pikes Peak quartz R. B. Riggs Report River rocks samples Schneider in Bulletin serpentine Silver Cliff Specific gravity T. M. Chatard trace H20 trace trace trace undet United States Geological variety W. F. Hillebrand W. H. Melville Washington White
Page 18 - ELPASOLITE. From St. Peters Dome, Pikes Peak district, Colorado. Described as a new species by Cross and Hillebrand in Bulletin 20. Incomplete analysis on insufficient material, by WF Hillebrand. The fluorine was deduced by calculation on the assumption that the metals are fully combined with it. Al 11.32 Ca _ .72 Mg .-.. .22 К 28.94 Na_.-_ , 9.90 F .. . . . 46.98 98.08 GEARKSUTITE.
Page 10 - Described as a new species by WH Melville, Am. Jour. Sci., 3d ser., vol. 43, 1892, p. 509. Waterworn pebbles. Sp. gr., 6.204. The silicate admixture, including the water, amounts to 13.38 per cent, of which 12.88 per cent, soluble in hydrochloric acid, is serpentine. The insoluble portion may be bronzite. Analyses of the silicates are as follows...
Page 74 - Analysis by EA Schneider. The loss is due to undetermined volatile matter. C. Brown mica from the granite of the Yosemite Valley, California. Analysis by William Valentine. Described by Turner, Am. Jour. Sci., 4th ser., vol. 7, p. 294.
Page 111 - Bulls. 78 and 90. In the original publications the gaseous constituent of uraninite was supposed to be nitrogen, as indeed it was in part. The discovery of helium, however, has shed new light upon the subject, and the analyses have been corrected accordingly. A, B, C, D, E. Crystallized uraninite from Bale's quarry, Glastonbury, Connecticut.