226 AGRICULTURE FOR COMMON SCHOOLS 



which they are bred. For example, in the markets they are 

 classed as plantation mules, cotton mules, lumber mules, rail- 

 road mules, mine mules, and levee mules, according as they 

 are fitted to do the work in the various places. 



Mules are used more extensively in the southern states than 

 in the northern. They can stand warm weather and hard 

 work better than horses, nor do they suffer so much from 

 the attacks of insects and diseases. The mule is a patient, 

 faithful, and gentle animal when sensibly treated and is use- 

 ful for hard work for a long period of years. 



The burro of the South-west and the Rocky Mountains is 

 a small animal of the donkey family. 



