A text-book of the diseases of the ear for students and practitioners . Fig. 170.— Large Defect of theMembrana Tympani. k, Short process of the hammer with thestump of the handle ;/, Tongue-shapedremnant of the membrane adherentto the promontory ; r, Fenestra ro-tunda. (From a preparation in theauthors collection.) Fig. 171.—Destruction of the In-ferior Half of the Membrane,with Exposure of the Promon-tory and Eecess of the RoundWindow. From a Man, 24 Yearsof age, who had suffered fromOtorrhcea since Childhood. The inferior end of the handle of the malleus destroyed through necrosis. Hearing-d

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A text-book of the diseases of the ear for students and practitioners . Fig. 170.— Large Defect of theMembrana Tympani. k, Short process of the hammer with thestump of the handle ;/, Tongue-shapedremnant of the membrane adherentto the promontory ; r, Fenestra ro-tunda. (From a preparation in theauthors collection.) Fig. 171.—Destruction of the In-ferior Half of the Membrane,with Exposure of the Promon-tory and Eecess of the RoundWindow. From a Man, 24 Yearsof age, who had suffered fromOtorrhcea since Childhood. The inferior end of the handle of the malleus destroyed through necrosis. Hearing-distance : Acoumeter = § = 2 m. promontory, while the anterior part remains free, and throws ashadow upon the inner tympanic wall which lies deeper. In afew cases, in which the periphery of the remnant of the mem-brane was free, the author saw a whitishor reddish band extend to the inner wallof the cavum tympani (Fig. 170). Wherethe perforation is small the handle ofthe malleus can rarely be distinguishedon account of the swelling of the cuticularlayer;

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectear, booksubjecteardi