STRUCTURE OF THE TEETH 



127 



A 



FIG. 151. ENAMEL PRISMS. ^350 diameters.) 



A, fragments and single fibres of the enamel, isolated by the action of hydrochloric acid. 



B, surface of a small fragment of enamel, showing the hexagonal ends of the fibres. 



FIG. 152. SECTION OF FANG, PA- 

 EALLF.L TO THE DENTINAL TU- 

 BULES. (Magnified 300 diameters.) 



1, cement, with large boue-lacunje aiid 

 indications of lamella? ; 2, granular 

 layer of Purkinje (interglobular 

 spaces) ; 3 , deutiual tubules. 



FIG. 153. SECTIONS OF 

 DENTINAL TUBULES. 



a, cut across ; &, cut 



obliquely. 

 (About 30u diameters.) 



where the globular deposit and the interglobular spaces may produce 

 a granular appearance (granular layer, fig. 152, 2), and also in the 



