DENTITION AND DLE&T. 129 
vecasionally), the front nippers in the upper and lower jaw make 
their appearance, and, during the period, which occurs between 
the third and fifth week, che miaele inci:crs appear. Between the 
seventh and ninth mount: the laterai or corner teeth are cut. The 
Fig. 8 
SEVEN YEARS OLD. EIGHT YEARS OLD. 
colt is now in possession of a full set of temporary incisors. These 
temporary, or “milk” teeth, differ from the permanent ones by 
being much smaller and (previous to shedding) whiter, having on 
their anterior or front surfaces grooves or furrows; also a well- 
defined body, neck, and slender fang. They also present oval 
surfaces anteriorily, or in front; and within the mouth they are 
concave. Their surfaces are generally uniform and smooth, and 
resemble the eye of an English horse-bean. 
Fig. 9. 
BORIZONTAL VIEW OF OLD BLACK HAWK’S INCISORS AND TUSHES. 
THe PerMANENT TEETH.—Constitutional idiosyncrasies are 
often operative in hastening or retarding dentition, and the char- 
ecter of the food, whether it be natural or artificial; and the 
9 
