Rural School Leaflet. 



1097 



mediate pair, at one to two weeks old and the third or lateral pair, 

 at about one month old. These baby teeth are long from right to 



left and have well-defined "cups." These "cups" 

 are small hollow depressions in the middle of the 

 teeth. 



Two and a half to three years old. — At about two 

 years and nine months the central permanent 

 teeth will appear, and at full three years of age 

 the outer part of the teeth and sometimes the 

 Fig. 108 — Lower nippers '^"^"^^^ also, will be up and in wear. Fig. 108. 

 at three years of age These permanent teeth are larger in every way 

 than the milk teeth. At this age, the intermediate milk teeth 

 have worn down and lost all or nearly all their cups. There will be 

 a slight black indentation that can hardly be called a cup. In the 

 lateral or corner teeth, the cups are greatly reduced; if the colt is a 

 male, small caps are likely to be present or in the process of coming 

 through the skin of the jaw. These are called tusks. 



Four years old. — At about three years and nine months the inter- 

 mediate permanent teeth appear. At four years of age, they are fully 

 up and in wear on the inside and sometimes on the outside. Fig. 109. 

 The central teeth show one year's wear. The cups are not so deep 

 as they were when the colt was three years old. The cups have nearly 

 or quite disappeared from the lateral or corner milk teeth, often nothing 

 but a slight dark indentation being left. The tusks, if any, have en- 

 larged but are still sharp at their points and flatfish on the inside. A 

 side view of a four-year-old mouth is shown in Fig. no. Note that 

 the crowns of the two milk teeth, one upper and one lower, come together 

 closely over their entire surface, while the two permanent teeth do not 

 meet at their back corners. 



Five years old. — At the age 

 of about four years and nine 

 months, the permanent corner 

 teeth make their appearance, 

 Fig. III. When full five 

 years of age, the outer exterior 

 parts of the teeth meet. Fig. 

 112 though almost one year 

 of wear must take place be- Fig 

 fore the lateral or corner 

 teeth are worn level over their 



109. — Lower nippers at 

 four years of age 



/ 



Fig. no. — Side 

 view of the teeth 

 of a four-year- 

 old horse 



over tneir entire surface. At five years of 

 age, the horse has a full set of teeth, and the central teeth have two 



