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FIRST TEAE SCIENCE 



In the north island of New Zealand, in Yellowstone Na- 

 tional Park and in Iceland, remarkable spouting springs 

 called geysers are found. These places have had recent 

 volcanic activity. The eruption of a large geyser is a 

 most picturesque and startling phenomenon. Almost 

 without warning there is thrown into the air a column 



. of hot water from which 



the steam escapes in 

 rolling clouds. It rises 

 in some cases to a height 

 of a hundred feet or 

 more and is maintained 

 at nearly this height by 

 the ceaseless outrushing 

 of the water for a time 

 varying from a few min- 

 utes to between one and 

 two hours. Then it 

 gradually quiets down 

 and dies away into a 

 bubbling spring of hot 

 water. 



The time at which 

 most geysers will erupt 

 is uncertain, but there 

 GIANT GEYSER IN ERUPTION. is one > Old Faithful, in 



Yellowstone Park, which 



is almost as regular as a clock, the time between its 

 eruptions being a little over an hour. This geyser plays 

 to the height of about 150 ft. and maintains the column 

 of water for about four minutes. The Giant Geyser of 

 the same region throws a large column of water to a 

 height of 250 ft. It plays from one to two hours. 



The outpouring hot water brings up with it dissolved 



