16 

 cavity simultaneously change ; and should the tooth 

 be removed, the space, no longer needed, is filled up ; 

 the alveolar cavity being obliterated by a growth of 

 bony matter. 



8. Teeth are orgariised, that is, they possess nerves, 

 arteries, veins, and absorbents, or are endowed with 

 those vessels needed to resist decay, and to promote 

 nutrition. That a tooth possesses nerves, no one who 

 has submitted to have these members filed by the 

 dentist, or who has endured the tooth-ache, can for 

 an instant doubt ; and that they are even, in some 

 degree, susceptible of external impressions, the sen- 

 sation produced by certain acids seems to render 

 probable. The growth they exhibit shows they are 

 gifted with arteries and veins ; and these vessels can 

 be traced directly to and from, though not unto, 

 their substance. The existence of absorbents some 

 have doubted ; but the removal by nature of the 

 fangs of the temporary teeth, clearly testifies the 

 presence of these vessels. 



9. The horse possesses forty teeth, viz., twelve 

 incisors, four tushes, and twenty-four molars. The 



