VETERINARY DENTAL SURGERT. 17 



animal substance. When enamel is examined micro- 

 scopically it present small prismatic hexagonal rods 

 notched on their faces. 



FIG. 2. 



a, Dentine traversed by its tubuli; , Interglobular or 

 nodular layer; cr, Cementum. Chauveau. 



b. a. 



FIG. 3. 



a, Transverse section of enamel, showing its hexagonal 

 prisms ; b, separated prisms. Chauveau. 



In simple teeth the whole free surface of the 

 tooth is covered by enamel. 



The cement covers the root portion of the den- 



