158 



VERTEBRATES. 



whip nor spur to excite them : but, when they begin to be fatigued, 

 their conductors support their spirits, or rather charm their weari- 

 ness, by a song, or the sound of some instrument. When they 

 want to prolong the route, or double the day's journey, they give 

 them an hour's rest; after which, renewing their song, they again 

 proceed on their way for many hours more ; and the singing con- 

 tinues until the time they stop. Then the camels again kneel 

 down on the earth, to be relieved from the burden, by the cords 

 being untied, and the bales rolled down on each side. They re- 

 main in this cramped' posture, with their belly couched upon the 

 earth, and sleep in the midst of their baggage, which is tied on 

 again the next morning with as much readiness and facility as it 

 was untied before they went to rest. 



The Dromedary is the Arabian camel. It is found in the 

 warmer parts of Asia, and in the upper regions of Africa. In 



The Bromejary. 



Asia it is not found further than Persia ; and in Africa, not fiir 

 ther than Ethiopia. It is common in most parts of India. 



