Dana's Manual of Mineralogy for the Student of Elementary Mineralogy, the Mining Engineer, the Geologist, the Prospector, the Collector, Etc

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J. Wiley & Sons, 1915 - Mineralogy - 460 pages
 

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Page 63 - It is then immersed in water and weighed again. Under these conditions it weighs less, since any object immersed in water is buoyed up by a force equivalent to the weight of the water displaced. Let the weight in water be represented by y.
Page 165 - Great Britain. In the United States salt is produced, on a commercial scale, in some fifteen states, either from rock-salt deposits or by evaporation of saline waters. Beds of rock salt are found in New York State from the Oatka Valley in Wyoming County east to Morrisville, Madison County, and south of this line wherever wells have been driven deep enough to reach the beds. The important producing localities are near Syracuse, Ithaca, Watkins, and Ludlowville, and at various places in Wyoming, Genesee,...
Page 426 - ... with it, is of the greatest value. On the following pages is given, therefore, a brief discussion of the more important modes of mineral occurrence, and of the more common associations observed. Rocks and Rock-making Minerals. Since by far the greater part of minerals occur as rock constituents a short description of the more important rock types and of the common rock-making minerals will be given first. Only the barest outline of the subject can be given here and for more detailed information...
Page 185 - The magnesium may be in part replaced by ferrous iron, or manganese, and the aluminum by ferric iron and chromium. Spinel is red, yellow, green, black, and other colors, and is used as a gem.
Page 317 - Tests. Fuses with swelling at 3. Decomposed by hydrochloric acid with the separation of silica but without the formation of a jelly. Solution after filtering off silica gives precipitate of aluminum hydroxide with ammonia, and in filtrate ammonium carbonate gives white precipitate of calcium carbonate. Gives much water in CT Recognized usually by its crystals. Occurrence. A mineral of secondary origin found usually with other zeolites, lining amygdaloidal cavities in basalt.

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