TYPES AND MARKET CLASSES OF LIVE STOCK 479 



port work in very rough or wooded country where wagons can- 

 not be used. The demand for these mules is limited. 



Plugs. These are worn out, cheap mules that have but 

 little value. They are usually unsound in one or more respects, 

 very plain and rough in form, and many are of advanced age. 



Export mules. The export trade in mules has increased 

 during recent years. Large shipments have been made to 

 South Africa, Philippine Islands, and Cuba. The size and type 

 of these mules varies, depending on the use to which they are 

 put and the country to which they are sent. Some are used 

 for army service, some for agricultural purposes, some for heavy 

 teaming, and some in mines. Hence the term "export mule" 

 is a trade name which is not restricted to any particular kind 

 of mules. 



