The Digestion of Food 



mean imperfect chewing of the food, and, hence, impaired 

 digestion. Decayed teeth are often the cause of an offen- 

 sive breath and a foul stomach. 



The teeth should be thoroughly cleansed at bedtime and 

 in the morning with a soft brush and warm water. Some 

 prepared tooth powder without grit should be used, and the 

 brush should be applied 

 on both sides of the teeth. 



When the enamel is 

 once broken through it 

 is never renewed. The 

 tooth decays, slowly but 

 surely ; hence we must 

 guard against certain 

 habits which injure the 

 enamel, as picking the 

 teeth with pins and 

 needles. We should 

 never crack nuts, crush 

 hard candy, or bite off 

 stout thread with the 

 teeth. 



To remove fragments 

 of food which have lodged 

 between adjacent teeth, 

 a quill or wooden tooth- 



FIG. 64. Lymphatics on the Inside 

 of the Right Hand. 



pick should be used. 



Even better than these 



is the use of surgeon's floss or silk, which when drawn 



between the teeth effectually dislodges retained particles. 



If the teeth are not regularly cleansed they become dis- 

 colored, and a hard coating known as tartar accumulates 

 on them and tends to loosen them. It is said that after 



