^90 COMPENDIUM OF THE VETERINARY ART. 



voar, soiiituimes longer, but those in the 

 (inder teeth are worn out a])out the end of 

 the eighth year; we shall therefore conline 

 our description now to the under jaw. 



As the two front teeth are the first that 

 ui?ike their appearance, it is obvious that 

 their marks will be lost sooner than those of 

 the other teeth; and if we examine the month 

 of a horse that has just completed his fifth 

 year, we shall find, that they are nearly, and 

 sometimes qiute worn out : those in the 

 adjoining teeth are about halt" their original 

 size, while the marks of the corner or end 

 teeth are perfect. At the end of the sixth 

 year, the only cavities observable are in 

 the corner teeth, and these are about half 

 their original size: the tooth has at this period 

 lost the shell-like appearance we have 

 before described, and is not diiferent from 

 tjie other teeth, except in having a mark or 

 cavity on its upper surface. At the end of 

 the seventh year the marks of the corner 

 teeth also are obliterated, and tlien the horse 

 js said to be aged. \V'e often find, however, 

 that the marks of the corner teeth are not 

 totally effaced at this perioi-i : a small dai'k 

 coloured i>pot may be observed in most horseii 



