emery wheel

A leaden wheel in which emery is embedded by pre ure, or, more commonly, a wooden wheel covered with leather and with a surface of emery. The wheel is fastened to a mandrel and rotated by a wheel and band; its principal use is in grinding and polishing metallic articles, especially cutlery. Sometimes called a Corundum Wheel, from the specific name of the crystalline pine, pit, sire, sir, marine; gō, põt, IMG:content-0929.png:[blocks in formation] Phar.: A substance which, when taken internally, causes vomiting, by producing an inverted action of the stomach and œsophagus, and the emptying of the stomach of any contents which may be present. They are used in cases of poisoning, and cases of phthisis, bronchitis, and croup. They are divided by Garrod into direct emetics-as sulphate of zinc, sulphate of copper, carbonate of ammonia, mustard flower, camomile, and common salt; indirect emetics-as ipecacuanha, tart a rated antimony, apomorphia; emetic agents-such as titillation of the fauces. The in direct emetics are used in inflammatory diseases, especially of the chest. emetic-cup, 8. A cup of metallic antimony in which wine is left for ten or twelve hours to become emetic.