244 



BLOOD-VESSELS OF DENTINE OR IVORY. 



roots, and even, it is said, extends into and fills up the 

 pulp cavity of the tooth. 



A FIG. 69. B 



Eruption of the Temporary Teeth. The precise time when 

 the temporary teeth make their appearance, is not always 

 the same, though the general law of fixed limitation, and 

 of a regular time of appearing, if not interrupted by any 

 disturbing cause, is as true and certain as with any other 

 portion of the body. 



Mr. Thomas Bell's observations make the four central 

 incisors to appear at from five to eight months after birth ; 

 the four lateral, from seven to ten ; the four anterior mo- 

 lars, twelve to sixteen ; the cuspidati, from fourteen to 



% 



FIG. 69, A represents an anterior view of the Temporary Teeth. 



FIG. 69, B represents a posterior and inner view of the same. 



FIG. 69, C represents a side view of the temporary teeth. 



FIG. 69, D represents a vertical section, so as to exhibit their pulp cavities. 



