144 THK PRINCIPLES OF AGRICULTURE. 



What is the ori;4iii of difTerent breeds of animals? What advantage 

 is there in thoroiiglibred animals? What advantage is thi-re in 

 a variety of breeds? Why is it ])ro(itable to provide shelter for 

 stock? For what two reasons should animals receive kind treat- 

 ment? How does unkind treatment reduce the income from 

 animals? 



