of the Atmnals of the Farm. 



33 



be satisfied that the test is a reliable one, and at the least it adds 

 to the means of judging the age of the horse at a period when 

 the signs on which reliance was formerly placed no longer exist. 



Fig. 25. — (d) Groove grown down from the gum, leaving the upper 

 part of the tooth smooth at the age of twenty-six years. 



The drawing on p, 32 (Fig. 23) shows the groove about half- 

 way down the tooth, which will indicate the age of fifteen or 

 sixteen years. 



Year by year the same process continues, and at twenty-one 



Fig. 26. — (e) Groove nearly worn out, upjjer part of Incisor 

 roiind and smooth at thirty years old. 



years of age the groove is seen along the entire surface of the 

 corner incisor, as shown in the drawing (Fig. 24, opposite). 



As the growth of the grooves of the tooth and wear of the 



C 



U r ) 



/C 



^ 



