THE GENEVA LIGHTHOUSE 



The level of the waters of Lake Geneva is subject to curious fluctuations, known as 

 seiches. During these disturbances the whole mass of water in the lake swings rhythmically 

 from shore to shore. A seiche has been known to cause a fluctuation of six feet in the level 

 of the water at Geneva. One explanation advanced for this phenomenon is the sudden varia- 

 tion in atmospheric pressure on the surface of the lake. 



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