THE CUPOLA. 77 



When the number of teeth is complete, in 

 an adult, and none have been lost, or drawn 

 out, each jaw contains sixteen ; and both, of 

 course, thirty-two. In the engraving, you see 

 there are eight teeth above and eight below ; 

 that is, just half of the whole. Children have 

 but twenty at first, or ten in each jaw. These 

 twenty are sometimes called the milk teeth, 

 because they appear while the child's principal 

 food is milk. These they shed, between the 

 ages of seven and fourteen years ; and thirty- 

 two new ones grow in their place. 



There is a period in every child's life say 

 at about the age of six years when, if it have 

 not yet begun to shed its first set of teeth, 

 there are forty-eight in both jaws ; twenty in 

 sight, and twenty-eight beneath them, lying 

 deep in the jaws, at their roots. 



When you look at the jaw-bone of man, or 

 any other animal, however, you do not see the 

 roots or fangs of the teeth. They are encased 

 or buried deep in the jaw. Those in front 

 have only one root each ; the grinders, or 

 double teeth, have two, and sometimes more. 



