632 



THE PEOPLE'S FARM AND STOCK CYCLOPEDIA. 



down also. The section of each nipper now appears more tri- 

 angular than oval. 



FIG. 14. MOUTH AT TEN YEARS. 



At this age we notice the oval surface shortening. The 

 mark in the middle teeth is worn down, but it is still visible in 

 the corner teeth. The corner teeth wear into a curve, as they 

 grow longer, and do not bear so directly on the lower ones. 



PIG. 15. MOUTH AT FIFTKBN YEARS. 



