. Diseases of the ear : a text-book for practitioners and students of medicine. such applications istemporarily to increase local hyperasmia, and, by means of thisincreased blood supply, to restore the tone of the parts andcause them to resume their normal condition. It makes butlittle difference what vapor is employed, so long as we bearin mind the object to be attained. Any preparation which isa local stimulant and vaporizes at the ordinary temperaturemay be used. Tincture of benzoin, oil of eucalyptus, menthol,iodine, camphor, and various aromatic oils may all be usedwith success; the vapor
. Diseases of the ear : a text-book for practitioners and students of medicine. such applications istemporarily to increase local hyperasmia, and, by means of thisincreased blood supply, to restore the tone of the parts andcause them to resume their normal condition. It makes butlittle difference what vapor is employed, so long as we bearin mind the object to be attained. Any preparation which isa local stimulant and vaporizes at the ordinary temperaturemay be used. Tincture of benzoin, oil of eucalyptus, menthol,iodine, camphor, and various aromatic oils may all be usedwith success; the vapor of alcohol, of ether, or of chloroformis also eflficacious. The best method of exhibition is by meansof a device by which the current of air on its way to thetympanum is made to pass over the volatile substance, thus TREATMENT—PROPHYLAXIS. 311 becoming charged with a certain amount of the volatile prin-ciple. Either Roosas or Lucys bulb, or the bottle devisedby Dayton, or the instrument of the author (see Fig. 94), maybe employed, according to the choice of the Fig. q4.—Authors middle-ear vaporizer. The bottle is fitted with a double stop-cock, and either air or medicated vapor can be insufflated at will by turningthe thumb-screw. If the authors apparatus is employed, it is well, instead offilling the reservoir with the fluid, to place a little cottonsaturated with the preparation to be used within this, as inthe event of the accidental breaking of the reservoir by asudden motion of the patient no damage is done to the gar-ments either of the patient or of the physician. My own preference when vapors are emplo3ed is first toclear the tube as perfectly as possible by inflating with airalone, after which the inflation is continued with the medi-cated air. The strength of the application varies with the na-ture of the substance and with the condition of the parts. Thementhol and camphor may be used in alcoholic solution inthe strength of one drachm of each to the o
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