Practical MineralogyH. Bailliere, 1843 - 192 pagina's |
Veelvoorkomende woorden en zinsdelen
alumina antimony arsenic Arsenic acid Augite baryta Berz Beud Beudant Bismuth blebby glass blow-pipe blue Bohemia borax brittle brown brownish bubbling C. P. Silica cerium charcoal chloride cobalt colour copper Cornwall crystallized fig earthy Easily fusible Effervesces fibrous concretions flame fluxes friable fuses Fusible Gives off water globule green greenish grey greyish Group Hartz Hornblende Hungary Infusible intumescence Klapr lead lime lustre magnesia magnet manganese masses matrass metallic minerals nitric acid Norway oblique rhombic prism occurs in small occurs massive octahedron odour opaque oxide of copper oxide of iron oxide of manganese P. F. a right P. F. an oblique Phil Phosphoric acid potassa primitive rocks Prismatic Prismatoidal protoxide of iron pyrites quartz reddish Rhombohedral right rhombic prism Saxony Sect sectile semi-metallic Siberia silver soda steel-grey substances sulphate SULPHURET Sweden Tellurium Tyrol varieties Vesuvius vitreous volatilizable yellow yellowish
Populaire passages
Pagina 193 - Scratches glass, though rather with difficulty, leaving its powder on it. Yields readily to the knife. 6. Scratches glass easily. Yields with difficulty to the knife. 7. Does not yield to the knife. Yields to the edge of a file, though with difficulty. 8. 9. 10. Harder than flint.
Pagina 193 - Chapman : 1. Yields easily to the nail. 2. Yields with difficulty to the nail, or merely receives an impression from it. Does not scratch a copper coin. 3. Scratches a copper coin; but is also scratched by it, being of about the same degree of hardness. 4. Not scratched by a copper coin ; does not scratch glass.