STRUCTURE OF THE TEETH 

 A 



127 



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- 

 KALLKL TO THE DKNTINAL TU- 

 BULES. (Magnified 300 diameters.) 



1, cement, with large bone-lacuna; and 

 indications of lamellae : 2, granular 

 layer of Purkinje (intcrglobular 

 spaces); 3 , dcntinal tubules. 



FIG. 153. SECTIONS OF 

 DENTINAL TUBULES. 



a, cut across ; 6, 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 



