Observations on the preservation of hearing, and on the choice, use, and abuse of acoustic instruments ... / [John Harrison Curtis].

  • John Curtis
Date:
1839
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Licence: Public Domain Mark

Credit: Observations on the preservation of hearing, and on the choice, use, and abuse of acoustic instruments ... / [John Harrison Curtis]. Source: Wellcome Collection.

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    honour to dedicate to me his valuable Ency- clopaedia of Anatomy. Having made these preliminary remarks, I shall now, for the information of the ge- neral reader, very briefly describe the ana- tomy of the ear in man. The human ear consists of three principal divisions, viz. an external, intermediate, and internal ear. The parts of the first division are called the helix, antihelix, tragus, anti- tragus, lobe, cavitas innominata, scapha, and concha. In the middle of the external ear is the meatus. ITie external or outward ear is designed by nature to stand promi- nent, and thus contribute to the s}Tnmetry of the head: but in Europe it is greatly flattened by the pressure of dress: it con- sists chiefly of elastic cartilage, formed into several hollows or sinuosities, all leading into each other, and finally terminating in the concha, or immediate opening into the tube of the ear. This shape is admirably adapted for receiving, collecting, and retain- ing sound, so that it may not pass off, or be sent too rapidly to the seat of impression.
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