The Mexican mining journal . duced is exposed to the air, it absorbsmoisture, forming calcium hydroxide. This absorbs car-bon dioxide from the air, resulting in calcium carbonateand water. Therefore, if exposed to the air, lime willgradually revert to a substance having the same chem-ical composition as that from which it was are as follows: CaO+H,0=Ca (OH)2Ca (OHh+CO^CaCO.+fLO These reactions form the basis for manufacture oflime products and its various uses. The chemical usesare numerous in the agricultural, bleaching, caustic al-kali, chemical gas, glass, grain milling, o
The Mexican mining journal . duced is exposed to the air, it absorbsmoisture, forming calcium hydroxide. This absorbs car-bon dioxide from the air, resulting in calcium carbonateand water. Therefore, if exposed to the air, lime willgradually revert to a substance having the same chem-ical composition as that from which it was are as follows: CaO+H,0=Ca (OH)2Ca (OHh+CO^CaCO.+fLO These reactions form the basis for manufacture oflime products and its various uses. The chemical usesare numerous in the agricultural, bleaching, caustic al-kali, chemical gas, glass, grain milling, oil, fat and soap,ore treatment, paint and varnish, paper, preserving,sanitation, smelting, sugar, tanning, and water soften-ing and purifying industries. A decree has been issued by the Government of Ve-nezuela providing that no concession granted by theexecutive shall be valid until it has been approved byCongress, and work must be postponed until that ap-proval has been obtained. April, 1915. THE MEXICAN MINING JOURNAL 132.
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