74 DISEASES OF CATTLE, SHEEP, GOATS, ETC. 



Incisors. 



Centrals Before or some days after birth. 



First Laterals Before or some days after birth. 



Second Laterals Fourteen days. 



Corners Two to three weeks. 



Molars. 



First Before or some days after birth. 



Second Before or some days after birth. 



Third Before or some days after birth. 



Fourth Six to nine months. 



Fifth Two and a-half years. 



Sixth Four to five years. 



The replacements are as follows : 



Incisors. 



Centrals One and a-half years. 



First Laterals Two and a-half years. 



Second Laterals Three and a-half years. 



Corners Four and a-half years. 



Molars. 



First One and a-half years. 



Second Two and a-half years. 



Third Three and a-half years. 



The fourth, fifth, and sixth are not replaced. 



As has been mentioned in the foregoing table, the calf is some- 

 times born with the nippers and first lateral teeth, or at least, they are 

 out in the first eight days. Towards the twentieth day, the second 

 lateral teeth appear, and at the end of the month the corners. How- 

 ever, the dental arch is not perfect, or round, or full, until five or six 

 months. The wear of the teeth varies with the mode of feeding ; in 

 general, it may be said, that the milk nippers are worn at ten months, 

 the first lateral teeth at one year, the second lateral teeth at fifteen 

 months, and the corners at twenty months. 



At this time the milk nippers, or centrals, are shed and are re- 

 placed by the permanent nippers, which are at their full growth at 

 two years old. 



From two and a-half to three years, the first milk laterals are 

 shed and the permanent ones make their appearance. 



From three and a-half to four years, the second lateral perma- 

 nent incisors make their appearance. 



From four and a-half to five years, the appearance of the perma- 

 nent corners takes place. 



From five to six, the jaw is full, and well rounded. 



From seven to eight, the nippers or centrals are worn. 



From eight to nine the laterals are worn. 



At ten years the corners are worn. 



At eleven, the teeth begin to become quite short and somewhat 

 separated. 



At twelve, the separation of the teeth is well marked, the dental 

 star appears as a white band, and the teeth assume a square rubbing 

 shape. 



