MISCELLANEO VS. 



847 



first show the marks of age and wear, and "often become somewhat 

 worn before the corner teeth appear. The four inner teeth do not 

 appear to wear so much on the outer edge as on the inside. At the 

 • end of eight weeks they are nearly as sharp as ever. After this pe- 



Fig. 1114.— The Teeth at 

 Fifteen Months. 



Pie. 1115.— The Teeth at 

 Eighteen Months. 



Pig. 1116.— The Teeth 

 at Two Years. 



riod the edge gradually wears down until the tooth presents a more 

 flattened surface, while the next outer teeth wear down in the same 

 way. At the end of three months this wearing away is very appar- 

 ent, and at four months all the incisors show marks of wear, the 

 inner ones showing the most. The teeth now begin to diminish in 

 size, as well as to wear down, and they gradually separate. , 



The appearance of the teeth from the, fifth to the eighth month 

 is represented in Fig. 1111. 



At ten mpnths; the 

 change shown in Fig. 

 1112 is dearly seen. 

 The spaces between the 

 teeth now begin to 

 show very plainly. 



At the age of one 

 year they usually pre- 

 sent the appearance 

 shown in Fig. 1113, and 

 at the age of fifteen 

 months, that represent- 

 ed in Fig. H14. The 

 corner teeth are now not more than half their original size, while 

 the middle teeth are still smaller. 



The Teeth 



Pig. 1117, 



at Three Years. 



■>' 



Fig. 



1118.— The Teeth at 

 Four Years. 



