118 QUEENSLAND AGRICULTURAL JOURNAL. [1 Fes., 1898. 
At eleven years, the mark of the corner teeth of the upper jaw is worn 
down. 
At twelve years, the nippers of the lower jaw have become round—as 
thick as they are broad; the middle teeth are approaching this state, and the 
corner ones increase in thickness. 
At thirteen years, the nippers and middle teeth of the lower jaw are 
perfectly rounded, the corner teeth are of increased thickness, and the hooks 
have become blunt. i 
At fourteen years, the corner teeth of the lower jaw have become round. 
At fifteen years, the nippers of the upper jaw are rounded. 
At sixteen years, the middle teeth of the upper jaw are rounded. 
At seventeen years, the corner teeth are rounded, 
At eighteen years, the nippers of the lower jaw have become triangular, 
At nineteen years, the middle teeth of the lower jaw are triangular, 
At twenty years, the corner teeth of the lower jaw are triangular. 
At twenty-one years, the nippers of the upper Jaw have become triangular. 
At twenty-two years, the middle teeth of the upper Jaw have become some- 
what triangular. 
At twenty-three years, the corner teeth of the upper jaw have become 
triangular. : : 
At twenty-four years, the nippers of the lower jaw have become twice as 
thick as they are broad. ; : 
At twenty-five years, the middle teeth of the lower jaw have become twice 
as thick as broad. 
At twenty-six years, the corner teeth show the same development as the 
middle teeth at twenty-five years. ; 
At twenty-seven years, the nippers of the upper jaw put on the same 
appearance. , ; 
At twenty-eight years, the middle teeth of the upper jaw are twice as 
thick as broad. } 
At twenty-nine years, the corner teeth of the upper jaw are twice as thick 
as broad, 
Beyond this we need not go; but we may remark that when horses are 
large and naturaliy have larger teeth than smaller ones, the other signs remain 
the same and the age is easily determined. 
