



CHAPTER XIII. 



THE COVERING. THE DOORS. 



The Ear. The Nose. The Mouth. 



THE doors of the house I live in are the 

 mouth, ears, nose, &LC. These I call doors for 

 reasons which have already been given, and for 

 others which will presently be seen. 



THE EAR. Some account of this has been 

 given in treating of the bones. The reader 

 has already been told that it is made for the 

 admission of sound ; that if there were no ear, 

 we could hear no sounds ; and that a part of 

 this curious organ lies deep in the bones of the 

 head. 



There are, in fact, two great divisions of 



the human ear ; the external and the internal. 



The external ear is what we see in the living 



individual ; consisting of a semi-circular portion^ 



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