FOUR YEARS. 



The eight peimanent incisor teeth are, now, all in contact, 

 respectively, with their fellows, and are on the same level. The 

 middle incisors are well in wear ; although the cavity on their 

 tables is not always completely surrounded by the central enamel. 

 Often, the cavity has disappeared out of the tables on the lower 

 front incisors, especially, in the case of thoroughbreds. The 

 corner milk-teeth are well worn down ; the upper ones being ready 

 to be pushed out. The tushes, as a rule, begin to show through 

 the gum. 



