285 COMPENDIUM OF THE VETERINARY ART. 



upper jaw. (We take no notice of the molares, 

 or grinders, as they are not concerned with 

 this subject.) When a colt is three years old, 

 we may observe that the four front sucking 

 teeth 'dxeAosty and that, instead of them, four 

 others have sprung wp, of a very different 

 appearance, being larger, of a darker colour, 

 and having a considerable cavity on the upper 

 surface, and a small dark coloured groove in 

 front : tht^se are termed horse's or perma7ient 

 teeth. Between the third and fourth year, the 

 four teeth next these are lost, and replaced, 

 in the way we have just described, by horse's 

 teeth ; so that when a colt has completed his 

 fourth year, there are eioht horse's teeth ob- 

 servable, and only four colt's teeth, one at 

 each extremity, or corner, as it is termed. 

 About the middle of the fifth year these also 

 fall out, and are succeeded bv horse's teeth. 

 The corner teeth of the horse, particularly of 

 the under jaw, are different from the rest, 

 being smaller, and of a shell-like appearance : 

 their cavities are chiefly within, the- upper 

 surface being a mere edge; but about the end 

 of the fiftii year they are larger and more like 

 the other teeth. It is jrenerallv between the 

 fourth and fifth year that the tushes make 



