of the Animals of the Farm. 
Fig. 5. — Incisors o/ Colt at six months. 
307 
Soon after seven months, indications of the cutting of the 
corner teeth may often be seen, and in many instances the 
points of the teeth will be observed pricking through the gum. 
At nine months old the colt will have the corner incisors 
in the mouth with their extreme anterior edges in apposition, 
leaving a triangular space, which is seen most perfectly on a 
side view when the lips are slightly separated. 
At this period the fourth molar, which is a permanent tooth 
from the first, begins to protrude through the gum, and bv 
the time of the completion of the first year it is level with 
the temporary molars ; but its surface is not worn, and the 
recent appearance of the tooth is most important as evidence of 
the age of one year. 
The illustration (Fig. 6, p. 398) shows the condition of the 
molar teeth at the completion of the first year. Three temporary 
molars have the upper surface worn, and are thus readily 
distinguished from the fourth molar, which has only recently 
been cut. 
The next illustration (Fig. 7, p. 399) shows the shell-like cha- 
racter of the corner teeth, and the state of the tables of the other 
incisors in the one-year-old colt ; and it may be remarked that 
the appearances correspond with those of the teeth of the five- 
year-old horse ; the chief difference being that in the yearling the 
teeth are temporary, and in the five-year-old permanent, organs. 
A practical horseman would perhaps feel amused at the idea 
of the possibility of a yearling being taken for a five-year-old, 
or a two-year-old for a six ; but in the case of rough forest- 
ponies, in which the aspect of colthood is quickly lost, such 
