262 



THE HORSE. 



PIG. 6. LOWER NIPPERS AND TUSHES AT FIVE TEARS OLD. 



1. 1. Central nippers, with their marks 3. 3. Corner nippers, with the mark plainly 



almost entirely worn out. seen, but the edges partially worn. 



2. 2. Next nippers, showing marks par- 4. 4. Tushes, with the grooves inside almost 



tially worn. obliterated. 



sixth molar is at its furl" growth, and the third is shed to make 

 room for the permanent tooth in its place. These two last-named 

 teeth should always be examined in cases where there is any doubt 

 about the age. After five years, no further shedding occurs in 

 any of the teeth. 



FlQ. 7. THE LOWER NIPPERS AND TUSHES OF A SIX-YEAR-OLD HORSE. 



B. The lower jaw. 



1. 1. The central nippers, with the 



marks worn out. 



2. 2. The next nippers, with the marks 



disappearing. 

 8. 3. The corner nippers, showing the 



mark plainly enough, but with the 

 edges of the cavity considerably 

 worn. 



1. The tushes, standing up three-quarters 

 of an inch, with their points only 

 slightly blunted. 



