756 



EXAMINATION FOR AG-E. 



5. The arch formed by the incisors in each jaw becomes, gradu- 

 ally, flatter and flatter. At first, when a liorse has a "full mouth," 



Fig. 203. — Longitudinal section from front to rear of a 

 permanent central incisor of the lower jaw. 



FA, anterior face. fi', posterior face. C, cement. 

 H, enamel. I, ivory or dentine. [Front Gouhaux and Bai-rier.) 



the tables of the incisors are so broad from side to side, that the 

 resulting arch is as round as practicable, in order to afford room 



