. Bulletin - United States National Museum. Science. 72 73 Figs. , Orthoclase (adularia). Crystal showing T (110) and x (101) simulating a rhom BOHEDRON. SILVER ClTY DISTRICT, OWYHEE COUNTY. 73, SAME. PENETRATION TWIN ON (100) faces of the crystals examined by Pirsson were too uneven and striated to afford good material for measurement and the results served only to indentify the forms. The face (T01) was strongly striated by oscillatory combination with the base. One of the larger crystals from Lindgrens illustrated specimen (pi. 6, lower) was analyzed by W. F. Hillebrand. The result
. Bulletin - United States National Museum. Science. 72 73 Figs. , Orthoclase (adularia). Crystal showing T (110) and x (101) simulating a rhom BOHEDRON. SILVER ClTY DISTRICT, OWYHEE COUNTY. 73, SAME. PENETRATION TWIN ON (100) faces of the crystals examined by Pirsson were too uneven and striated to afford good material for measurement and the results served only to indentify the forms. The face (T01) was strongly striated by oscillatory combination with the base. One of the larger crystals from Lindgrens illustrated specimen (pi. 6, lower) was analyzed by W. F. Hillebrand. The results of this analysis are below compared with the theoretical composition of orthoclase. Analysis of valencianite, Silver City (W. F. Hillebrand, analyst) Per cent found Per cent theory Silica (SiOj) 66. 28 .25 Alumina (AljOj). Potash (KjO)._ Soda (Na:0) Total Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
