. Annual report. New York State Museum; Science; Science. GYPSUM DEPOSITS OF NEW YORK 9 (CaO) ; sulfuric acid anhydrid (SO.) ; water (HgO) The crystallized variety of gypsum may show a close ap- proach to these percentages, but the ordinary rock and earthy gyp- sum employed in the industries contains a variable proportion of foreign matter which amounts generally to several per cent of the whole mass. The crystals of gypsum belong to the monoclinic system and are usually formed by a simple combination of faces. According to the relative development of the latter, they may be tabu
. Annual report. New York State Museum; Science; Science. GYPSUM DEPOSITS OF NEW YORK 9 (CaO) ; sulfuric acid anhydrid (SO.) ; water (HgO) The crystallized variety of gypsum may show a close ap- proach to these percentages, but the ordinary rock and earthy gyp- sum employed in the industries contains a variable proportion of foreign matter which amounts generally to several per cent of the whole mass. The crystals of gypsum belong to the monoclinic system and are usually formed by a simple combination of faces. According to the relative development of the latter, they may be tabular or flat- tened, prismatic, or elongated into acicular individuals. They are sometimes twinned so as to yield arrowhead forms. The common types of crystals are represented by the accompanying figures. The. 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 New York State Museum. Albany : University of the State of New York
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1902
