STRUCTURE OF THE TEETH. 



151 



tion. This is especially the case near the surface of the dentine, 

 where the globular deposit and the interglobular spaces may produce 



FIGS. 173 AND 174. ENAMEL PRISMS. (350 diameters.) (Kolliker.) 



Fig. 173. Fragments and single fibres of the enamel, isolated by the action of hydrochloric acid. 

 Fig. 174. Surface of a small fragment of enamel, showing the hexagonal ends of the fibres. 



FIG. 175. SECTION OF FANG, PARALLEL 



TO THE DENTINAL TUBULES. (Magni- 

 fied 300 diameters.) (Waldeyer.) 

 1, cement, with large bone lacunae and indi- 

 cations of lamellae ; 2, granular layer of 

 Purkiiije (interglobular spaces) ; 3, dentinal 

 tubules. 



--"= 





FIG. 176. SECTIONS OF DENTJNAL 



TUBULES. (Fraenckel.) 



a, cut across ; 6, cut obliquely. 



(About 300 diameters.) 



