U. S. Dept. of Agriculture, Diseases of the Horse. 



Plate i. 



Age of Horses as Indicated by Teeth. 



Longitudinal section of left central lower incisor 

 and cross sections of same tooth showing table surfaces- 

 as they appear at the ages of 3, S, 7, 9, IS, 20 and 25 

 years. C, Cement; D, Dentine; E, Enamel; /, Infundi- 

 bulum; K. Cup; P, Pulp Cavity; S, Star. 



