BOILING SPRINGS. 



phureous smell accompanying thunder, just as there 

 is accompanying earthquakes, which shows that 

 there are other atmospheric ingredients acted on 

 by the commotion of the water and the heat. 



When water remains on the ground in the 

 liquid state, its operations are more open to un- 

 guided observation than when it is on its aerial 

 passage from the sea to the land ; and its natural 

 uses there are much more profitably viewed in 

 connexion with those substances and productions 

 to which it is useful. But on the earth's surface, 

 and even in cavities within the earth, heat has the 

 same kind of effect upon it as when it is in the 

 atmosphere. Boiling springs are among the most 

 curious of these phenomena ; and one of the most 

 remarkable is the great Geyser in Iceland, which 

 is a sort of natural steam engine, which, like 

 some of the high-pressure engines, blows its steam 

 into the air. 



THE GEYSER. 



