Diseases of the nose and throat; a text-book for students and practitioners . EAYARMAILC.: > _ . -Authors Self-retaining WireSpeculum. Fig. 6.—Oval. Hard-rubberSpeculum. are preferable when applying acids to the nasal employs a long, slender, hard-rubber tube for exploringthe parts about the posterior nares. For purposes of illumination ordinary daylight can beutilized as suggested, but, as this is usually too diffused, it isbetter to make use of the suns rays or some form of artificiallight. Gas-light furnished by an Argand burner is mostly OOO. -CO. P/MA. Fig
Diseases of the nose and throat; a text-book for students and practitioners . EAYARMAILC.: > _ . -Authors Self-retaining WireSpeculum. Fig. 6.—Oval. Hard-rubberSpeculum. are preferable when applying acids to the nasal employs a long, slender, hard-rubber tube for exploringthe parts about the posterior nares. For purposes of illumination ordinary daylight can beutilized as suggested, but, as this is usually too diffused, it isbetter to make use of the suns rays or some form of artificiallight. Gas-light furnished by an Argand burner is mostly OOO. -CO. P/MA. Fig. 7.— Zaufals Speculum. employed, because more easily controlled; but it is not alwayssufficiently powerful for examining the trachea, when it may benecessary to employ electricity, magnesium wire, oxyhydrogen,lime, or some equally powerful illuminant. A very good light,as suggested by Sajous ( Diseases of the Nose and Throat ), isobtainable by dropping a small piece of gum-camphor into thetank of an oil-lamp. Transillumination, by placing an illumi-nated glass rod against the skin surface, is sometimes of value. 16 DISEASES OF THE NOSE AND THROAT. When ready for the examination the room should be dark-ened. If sunlight be the iliuminant, it is best to have a smallhole in the shutter or blind, through which the pencil of raysmay pass; but a good examination may be made without dark-ening the room. Where direct artificial illumination is used, thelight is placed ten or twelve inches in front of the patients examiner either stands or seats himself
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