LESSON X. 



ON TIIK TEETH OF THE DOUSE. 



ONE YEAR OLD. 



The colt at one year old lias his full conipleinent of 

 teeth, six in the upper and six in the lower jaw. These 

 are called the tem])orary, or milk teeth. The two 

 centre nippers arc })artially worn down, the two lateral 



teeth are less so, and the outside ni])pers are but little 

 worn, having the cavities deep and long. The cavities 

 in the centre nippers arc less distinct than in any of the 

 others, but they are still long, narrow, and black. 



These cavities in the teeth of the lower jaw constitute 



