112 



means easily recognised. The annexed wood-cut 

 will suQ-p-est the nature of the chano^e. In it will 

 be seen a further remove from the oval form of these 

 parts in the young mouth. The surfaces have be- 

 come square or angular, and the corners are only 

 sufficiently rounded to indicate what once was the 

 shape which they exhibited. 



The following wood-cut depicts the tables at the 

 completion of the fourteenth year, and only by 

 careful comparison could the increase of age which 

 they denote be detected. On inspection, however, it 

 will be seen that the irregularities of outline are less 

 prominent even than at the twelfth year. 



54. At sixteen years old, when the teeth m^e 

 vieiced from the side, only two incisors can be seen in 



