THE SKIN. 



167 



10. Certain cautions are to be observed in bathing : 



1. Never bathe directly after a full meal. The blood 

 is then directed -to the stomach, and active work is 

 going on there. Other organs are relaxed. The bath 

 will hinder digestion, and sometimes cause an injurious 

 shock. 



s. Never bathe in cold water when the system is greatly 

 exhausted. Very delicate persons should not bathe in 

 cold water at all. 



8. Be very cautious about bathing in cold water when 

 heated, especially if you are at the same time tired. 



4. Never stay in the water until you are chilled, so 

 that you do not get warm soon on coming out, or until 

 you feel languid and weak instead of feeling refreshed. 



Great injury sometimes results 

 from neglect of these rules. 



THE EAR. 



SECTION III. 1, The ear, 

 like the nose, is partly outside, 

 and partly inside, of the head. 

 It may be divided into 



The External Ear. 



The Middle Ear. 



The Internal Ear. 



2, The external ear is like an 

 ear-trumpet; and its design is to 



collect the sound, and carry it in THE EAR. -i'1>arts of the extent 

 toward the internal ear, where eai - 2 - Part8 of the middle ear. 



., ., , . T ., 3. Parts of the internal ear. 



the nerve of hearing is. Like an 



ear-trumpet, it has an open part and a tube. The tube 



enters the head : the open part is on the outside. It is 



