CHAPTER VII. 



OF WIND AND WATER 



He commandeth and raiseth the stormy wind, which Hfteth up 

 the waves thereof. "^Psalm cvii. 20. 



" Measure me a measure of wind." — 2 Esdras. 



/^VER the great Deep of blue water lies the 

 ^-^ greater Deep of blue air. And between 

 these two — the Ocean of Air and the Ocean 

 of Water, both dragged earthward by the per- 

 petual pull of gravitation — endless intercourse 

 takes place. Each finds its way in small frag- 

 ments into the other. There is always water 

 present in the air. There is always air present 

 in the water. 



Perhaps the latter fact is not so widely recog- 

 nised as the former ; yet it is equally true. Sea- 

 water contains large supplies of dissolved gases, 

 absorbed by the ocean-surface from the atmo- 

 sphere, and passed on Into lower depths, for the 

 use of creatures living there. 



But the presence of water In air is known to 

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