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Chemistry Elements and Compounds |
Record 1 to 21 of 21 |
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Aluminum "The mineral corundum which includes the precious stones ruby, sapphire, and topaz, contains alumina, or aluminum oxide, Al2O3. It is found in nature crystallized in rhombohedral forms, having a speci... |
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Chlorine This illustration shows how to make chlorine by using hydrochloric acid and permanganate crystals.... |
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Copper Sulphate "The crystalline form of copper sulphate." — Hallock, 1905... |
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Diamond "One crystalline form of diamond." —Hallock 1905... |
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Diamond "One crystalline form of diamond." —Hallock 1905... |
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Diamond "One crystalline form of diamond." —Hallock 1905... |
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Diamond "One crystalline form of diamond." —Hallock 1905... |
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Fibers Figure A shows cotton fibers which are smooth on the surface, where as figure B shows woolen fibers that are covered with scales.... |
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Graphite "The second form of carbon, known as graphite, is a leaden-gray solid with a metallic luster and a specific gravity of 2 to 2.2, which crystallizes." —Hallock 1905... |
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Hydrogen This illustration shows pure hydrogen being collected by passing electricity through a dilute acid.... |
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Hydrogen This illustration shows a beaker full of sulphuric acid and a stick of zinc, giving off hydrogen.... |
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Oxidation This illustration shows moist phosophorus oxidizing to get the oxygen out of the enclosed area.... |
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Oxygen Release This illustration shows oxygen escaping leaves when they are placed in water and then in sunlight.... |
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Phosphorus "At the freezing point [phosphorus] hardens, becomes brittle, and shows, on being broken, evidences of crystalline structure, the crystals being dodecahedral." —Hallock 1905... |
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Plagioclase "A (010) cleavage flake of plagioclase." -Johannsen, 1908... |
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Plagioclase Feldspars "Cross-sections at right angles to both (001) and (010) showing (+) and (-) character of extinction in plagioclase feldspars." -Johannsen, 1908... |
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Plagioclase Twin "The (010) face of a Carlsbad twin of plagioclase." -Johannsen, 1908... |
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Quicklime This illustration shows a tower filled with quicklime, being used to filter out gas from water vapor.... |
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Sulphur "One allotropic forms of sulphur, that of a lemon-yellow brittle solid, crystallizing in orthorhombic octahedrons." —Hallock 1905... |
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Sulphur "An allotrope of sulphur, when heated to 115 degrees Celcius, will cool to be yellowish-brown, needle-shaped crystals, derived from an oblique prism." —Hallock 1905... |
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Sulphuric Acid This illustration shows a bottle of sulphuric acid.... |
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