TRADE WINDS. 299 



Q. How does the COMBINATION of these two 

 currents give a new direction to them both ? 



A. When these currents of air meet 

 at the equator, they clash together, and 

 fly off in a new direction. 



Q. Do trade winds blow from the north-east 

 and south-east ALL the YEAR ROUND ? 



A. Yes, in the open sea; that is, in 

 the Atlantic and Pacific Oceans for about 

 30 deg s - each side of the equator, 



Q. Do the TRADE WINDS blow uniformly from 

 north-east and south-east in the INDIAN OCEAN ? 



A. No ; nor yet in those parts of the 

 Atlantic and Pacific which verge on the 

 land. 



Q. Why do not the trade winds blow uniformly 

 from north-east and south-east in the INDIAN OCEAN ? 



A. Because when Arabia, Persia, 

 India, and China, are exposed to the 

 enormous heat of their summer sun, the 

 air is so rarefied, that the colder air from 

 the south pole rushes towards these 

 nations, and not to the equator ; in con- 

 sequence of which, a SOUTH-WEST wind is 

 produced for six months of the year. 



Q. How does it blow for the OTHER 6 months ? 



