STRUCTURE OF THE TEETH 

 A 



127 



FIG. 151. ENAMEL PRISMS. ^350 diameter?.) 



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- 

 RALLEL TO THE DENTINAL TU- 

 BULES. (Magnified 300 diameters.) 



1, cement, with large bone-lacuna? and 

 indications of lamellas ; 2, granular 

 layer of Purkinje (interglobular 

 spaces); 3 , deiitinal tubules. 



FIG. 153. SECTIONS OF 

 DENTINAL TUBULES. 



a, cut across ; b, cut 



obliquely. 

 (About 300 diameters.) 



where the globular deposit and the interglobular spaces may produce 

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



