Health knowledge : a thorough and concise knowledge of the prevention, causes, and treatments of disease, simplified for home use . emperature,and so when sprayed over the skin rapidly evaporates. It dis-solves many substances, such as fats, oils, resins, better than al-cohol or water, and is accordingly used in the preparation ofmany drugs. Externally it is used as a cleansing agent beforeoperations, because, dissolvingas it does the fat from the smallcracks and entrances to the hairfollicles, it renders the surfacemore accessible to water. It hasalso been used externally as afreezing agent t
Health knowledge : a thorough and concise knowledge of the prevention, causes, and treatments of disease, simplified for home use . emperature,and so when sprayed over the skin rapidly evaporates. It dis-solves many substances, such as fats, oils, resins, better than al-cohol or water, and is accordingly used in the preparation ofmany drugs. Externally it is used as a cleansing agent beforeoperations, because, dissolvingas it does the fat from the smallcracks and entrances to the hairfollicles, it renders the surfacemore accessible to water. It hasalso been used externally as afreezing agent to abolish sensa-tion for small operations, thoughin this respect its place is nowtaken by ethyl chloride. By in-halation it is used as a generalanesthetic. Internally it is usedoccasionally for relieving painsuch as colic, and also for itsstimulating properties. In casesof heart-failure and collapsefrom other causes half a dramto a dram is often injected hypo-dermically. Elecampane.—This tall herbgrows in Europe and also in themeadows of the United mucilaginous root acts as ageneral tonic and pulmonary Elecampane. 1170 MATERIA MEDICA antiseptic, being recommended in consumption, especially incombination witli other drugs. It is made as a decoction, andsugar added. Ethyl Bromide and Ethyl Chloride are clear, colorless liquids,produced respectively by the action of liydrobromic and hydro-chloric acids upon alcohol. Both are extremely volatile, andrapidly produce freezing of the surface when sprayed upon they are used to produce insensibility to pain forsmall and short operations. Ethyl chloride is put up in grad-uated glass or metal tubes, with a fine nozzle, under the name ofkelene. The tube is warmed by the hand, and the liquid jetsout in a fine spray. They are also used singly or mixed to pro-duce general anesthesia by inhalation. This effect they inducein a few moments, and sensation returns after their discon-tinuance in an equally short space of
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectmedicin, bookyear1920
