192 



AGE OF THE DOMESTIC ANIMALS. 



Fig. 174. 

 Skull of a full-grown primitive Texas boar. 



Fig. 175. 

 Skull of a full-grown sow of the small Yorkshire breed. 



" The pig has, perhaps, the most elastic and changeable 

 organization of any of our domestic animals. It also has the 

 advantage of being able to digest all kinds of food as an om- 

 nivorous animal ; and last, though not least, it multiplies more 

 rapidly than any domestic animal, — even the sheep. Therefore, 

 it has been at all times regarded, and properly too, as the 



