410 
Dentition as indicative of the Age 
In the eight-year-old mouth the form of the tables of the 
incisors and the shape of the central enamel in the central 
incisor afford tolerably satisfactory indications of the age. The 
central teeth are more distinctly triangular than they were at 
seven years ; the central enamel in these teeth is also triangular 
in figure. All the tables of the incisors are w orn as level as the 
different degrees of density of the various structures will permit. 
The cavities are either very shallow or quite obliterated by 
being filled up with one of the tooth tissues, although the 
central enamel in each tooth is perfectly well defined. The 
gum of the corner incisors at eight years has lost its circular 
form and become square. The tusks are more blunted at the 
tops than in the seven-year-old mouth. 
In the next illustration (Fig. 17) the appearance of the eight- 
Fig. 17. — Incisors of Horse, Peep-d'-daij-Boy") at eight years. 
year-old mouth is shown. The drawing was copied from the 
mouth of " Pcep-o'-day-Boy " in 1852. The horse was foaled 
in 1844. 
