. A Reference handbook of the medical sciences : embracing the entire range of scientific and practical medicine and allied science. meter, composed of cap-like annuluS, to the axis of the layers arising from the short pro- external auditory meatus. cess. No reaction nor recurrence rni,;„ ;„ ,,., ,,, „•:„„„i,i„ „,,i, followed its removal. Tbls ls unquestionably sub- ject to very considerablevariations as an individual peculiarity; but the viewwhich ascribed the differences to a variable relation ofthe planes of the two drum-membranes to each other andto the plane of the base of the skull, is p
. A Reference handbook of the medical sciences : embracing the entire range of scientific and practical medicine and allied science. meter, composed of cap-like annuluS, to the axis of the layers arising from the short pro- external auditory meatus. cess. No reaction nor recurrence rni,;„ ;„ ,,., ,,, „•:„„„i,i„ „,,i, followed its removal. Tbls ls unquestionably sub- ject to very considerablevariations as an individual peculiarity; but the viewwhich ascribed the differences to a variable relation ofthe planes of the two drum-membranes to each other andto the plane of the base of the skull, is probably errone-ous. Pollak and Politzer4 have shown that the inclina-tion of the plane of the annulus is fairly constant—beingno greater in the infant than in the adult; while dailyclinical experience shows marked variations in the rela-tion of the axis of the external meatus to the planes ofthe skull. Further discussion of the point is not here inplace ; but this much is of importance as bearing uponthe apparent obliquity of the drum-membrane as seen inlife; and should be borne in mind in forming our judg-. ments as to the shape and posi-tion of the structure in ourclinical studies. Pathological.—The first pointwhich claims attention in theexamination of the tympanicmembrane is the lustre of itssurface, or its lack of latter can hardly ever beregarded as normal, the dulnessindicating that the epithelialcovering is either rough or sod- Fl°: ^O--1 » y°e ?»> , ,,P „ ., _,, 9 , whoseear-affection had lasted den with fluid. I he size, form,
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectmedicine, bookyear188
