HOW TO TELL THE AGE. 



315 



Fig. 378.— From Two and One Hall 

 to Three Years. 



outer edge rising in a slanting direction, above the inner edge. This, 

 however, soon begins to wear down, until both surfaces are level,, 

 and the mark, which was originally long and narrow, becomes 



shorter, and wider, and fainter. At 

 six months the four nippers are 

 beginning to wear to a level. Fig. 

 375, will convey a good idea of the 

 appearance of the teeth at twelve 

 months. The four middle teeth 

 are almost level, and the corner 

 ones becoming so. The mark in 

 the two middle teeth is, wide and 

 faint ; in the two next teeth it is 

 darker, and longer, and narrower ; 

 and in the corner teeth it is dark- 

 est, and longest, and narrowest. At the age of one year and a half, 

 the mark in the central nippers will be much shorter and fainter ; 

 that" in the other two pairs will have undergone considerable change, 

 and all the nippers will be flat. At two years this will be more 

 plainly marked. Fig.' 311 is intended to show the appearance of 

 the-rtiouth at this stage. 



Fig. 378 is intended to show the appearance of the mouth at 

 two, and a half to three years old. 

 The next is intended to show it at 

 three and a half years old. The two 

 central permanent teeth are growing 

 down, and are larger than the others, 

 with two grobves in the outer con- 

 vex surface, and the mark is long, 

 narrow, deep, and black. Not hav- 

 ing yet attained their full growth, 

 they are lower than the others. The 

 mark in the two next nippers is 

 nearly worn out, and is wearing away 

 in the corner nippers. 



Between three and a half and four 

 years the central nippers have at- 

 tained to nearly their full growth, and the second pair will have 

 so far displaced the temporary teeth as to appear through the gums, 

 while the corner ones will be diminished in breadth, worn down, and 

 the mark become small and faint. 



At four years the central nippers will be fully developed ; the 



Fig. 379.— About Three and One 

 Half Years. 



