Elements of MineralogyP. Elmsly, 1784 - 412 páginas |
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Términos y frases comunes
aerial acid alfo alkali alſo analyſed antimony aqua regia arfenic argill argillaceous barytes Bergm Bergman blue borax brown calcined calx of iron cauftic cent clay cobalt colour compound confifts contain copper cryftalized decompofed dephlogiſticated difficultly diffolved diftilled diftinguiſhes diſcovered eaſily effervefce with acids faid falt fame feparated fhoerl fhould filex filiceous filiceous Earth filver fire with fteel firſt fixed air fixed alkali fmall foluble folution fome fometimes fpar fpecies ftate ftone fubftances fufible fulphur genus give fire glaſs green grey hardneſs heat lamellar lefs leſs maffes magneſia manganefe marine acid melts metallic mica mild calcareous Earth mineral alkali mixed moſt nickel nitre nitrous acid opake precipitate proportion pyrites quartz reddiſh regulus ſcarcely ſeparated Shiftus Siliceous ſmall SPECIES SPECIES II ſpecific gravity ſtate Steatites ſteel ſtone tains texture thefe theſe thofe thoſe tranſparent uſed VARIETY vitriolic acid volatil alkali weight yellow yellowish zinc
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Página 375 - Ihoerl, which is frequently a component part of granite, it follows that it muft be one of the primitive earths, and not entirely derived from marine exuviae as many imagine. Quartz can never be fuppofed to be a product of fire, for in a very low heat it burns, cracks, and lofes its tranfparency, and i...
Página 393 - ... be the effect of a thin fufion, but in that cafe its texture fhould be glafly ; whereas it is merely earthy and devoid of cavities. Hence we may underftand how it comes to pafs that lava perfectly vitrified, and even water, are.fometimes found inclofed in bafaltes. Mon. Mineral. 511. Von Troil, 285.
Página 378 - It is better, on this account, in graduating the bottle, to make two scratches as represented in the drawing, one at the top and the other at the bottom of the curve : this prevents any future mistake.
Página 375 - ... means of the evaporation of part of the waters into the atmofphere, and the gradual retreat of the remainder, the various fpecies of earths before...
Página 353 - Manganefe feems to be contained in the afhes of moft vegetables, and to it the blue or greenifh colour of calcined vegetable alkali is owing. Thefe colours are generally attributed to the phlogifton of the alkali ; but if fo, they...
Página 218 - German chemifts ; but, according to Mr, Mills, they contain none. By diftillation it yields an ill fmelling liquor, mixed with a 'volatile alkali and oil, part of which is Ibluble in fpirit of wine, and part infoluble* being of a mineral nature.
Página 376 - Bb fo fo that in every eflential point it is totally unlike to glafs to which fome have compared it. As granite contains earths of every genus, we may conclude that all the fimple earths are coeval with the creation.
Página 81 - ... ftate of the iron contained in it. It is found not only in Italy but alfo in France, in the provinces of Auvergne and Limoges, and alfo in England, and elfewhere.
Página 346 - If the solution he boiled with twice its weight of strong nitrous acid, the regulus •of antimony will be precipitated, and the arsenic •converted into an acid, which may be obtained by evaporation to dryness. Manganese Ore. — The regulus is obtained by mixing the calx or ore of manganese with pitch, making it into a ball, and putting it into a crucible, lined with powdered charcoal...
Página 351 - Derbyshire by the name of black wad, is remarkable for its spontaneous inflammation with oil. It is of a dark brown colour, of a friable earthy appearance, partly in powder and partly in lumps. If half a pound of this be dried before a fire, and afterwards suffered to cool for about an hour, and it be then loosely mixed or kneaded with two ounces of linseed oil ; the whole, in something more than half an hour, becomes gradually hot, and at length bursts into flame. This effect wants explanation :...