92 



The periods when the teeth which characterize the 

 fifth year make their appearance, must now be 

 described. Wlien the animal is four years and three 

 months of age, the gums of the upper corner teeth 

 begin to redden, and before it is three months older, 

 one of the corner milk teeth may have been removed. 

 The opposite milk tooth speedily follows, and then 

 the corner horse incisors grow down, and seem 

 almost to be fully developed before the corner milk 

 teeth of the lower jaw are shed. When, however, 

 all the milk teeth are lost, the corner incisors will 

 not touch for some time ; and by the completion of 

 the fifth year, though the teeth approximate, their 

 tables are not formed, nor do their edges denote any 



