54 THE H0K8E. 



varieties, or his improvement hy culture, I proceed to give from 

 Mr. Youatt the following delineation and description of his 

 external structure, and subsequently to submit from the best 

 authorities a short account of the method of ascertaining the 

 age of the horse, with an explanation illustrated by cuts of the 

 structure of the jaws and teeth, and of the arrangement and 

 changes of the dental system ; which ended, I shall advance 

 to the consideration of the various families and varieties of 

 this noblest of the quadruped creation, and first, as noblest, to 

 the improved thorough-bred horse of Great Britain and North 

 America. 



