Lectures on Aural Catarrh [NOOK Book]

Overview

This is an EXACT reproduction of a book published before 1923. This IS NOT an OCR'd book with strange characters, introduced typographical errors, and jumbled words. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing ...
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Lectures on Aural Catarrh

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NOOK Book (eBook - Digitized from 1874 volume)
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Overview

This is an EXACT reproduction of a book published before 1923. This IS NOT an OCR'd book with strange characters, introduced typographical errors, and jumbled words. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.
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Product Details

  • BN ID: 2940025863618
  • Publisher: Churchill
  • Format: eBook
  • Edition description: Digitized from 1874 volume
  • File size: 563 KB

Read an Excerpt


LECTURE III. METHOD OF EXAMINATION—(continued). Gentlemen,—You have seen, in the out-patient's room, what very valuable assistance to our means of diagnosis is afforded by the use of the vibrating tuning-fork placed on the vertex of the patient's head; in fact, you never witness a thorough examination of a new comer without this test being applied. It is only within a short period that a knowledge of the fact of sound-conduction by the bones of the head has been rendered so practically valuable in the diagnosis and prognosis of aural disease, and we are chiefly indebted to Lucse, Politzer, and Mach for their scientific investigations in this direction. The tuning-fork is employed principally in distinguishing affections of the conducting apparatus (the external and middle divisions of the ear) from those of the auditory nerve. It had been known for years thatthe watch or tuning-fork, placed on the forehead or between the teeth, was better heard if the auditory meatus was stopped with the fingers; but no very satisfactory conclusions were drawn, nor any material aid in diagnosis derived from this fact. It must always be remembered that any sonorous vibrations which once get into the tympanum become intensified by resonance. The common speaking-tube is a familiar example of sounds being strengthened thus when confined in cavities of any sort. That this is the case with regard to the tympanum and its continuous tube, the osseous meatus, may be proved by closing the external passage with the fingers, when, if a tuning-fork be set vibrating on the head, or a humming sound or reading be kept up, the sounds, being conveyed through the cranial bones to the cavities of the ear,will become considerably intensified. This fact is made still more evident by placing a vibrating tun...
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