SWIRLS OF THE SEA 



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Thelife- 

 giving prop- 

 erty of 

 change. 



ward, become cooler, then descend and return 

 to the equator as the cold air of the north or 

 south. Again in these winds that parallel the 

 ocean currents and, practically, are a part of 

 them, there is a completed circle — a swirl of 

 the air. And again is the very existence of 

 the air and its life-giving properties to the 

 earth maintained by this movement. Without 

 the exchange of aerial temperatures one 

 part of the earth would freeze while another 

 part would burn, and all parts would event- 

 ually perish from the violence of the ex- 

 tremes. 



How different from this circulatory move- 

 ment of our little world is the great elliptical 

 swing of the solar system? Is there not a 

 swirl of the universe as well as of the sea and 

 air? And is it, too, not caused primarily by 

 difference in temperature? The extremes of 

 the equator and the poles are sufficient to set 

 in motion thousands of miles of air and water; 

 but what is the heat of the equator to the blaze 

 of the sun itself or the cold of the poles com- 

 pared with the possible absolute zero of upper 

 space? If the heat of the sun flows out (as 

 we know it does) must not the cold of space 

 flow in? On the tremendous currents thus set 

 in motion would the planets of our solar sys- 



Suirl of the 

 solar system 



