126 A TEXTBOOK OF OCEANOGRAPHY 



..•■/.•■ ac? .■■•■■"■ 



Shetland [I. 



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^■■^'' [^v'Orkneyl. V 



The Hébrides 



FiG. 21. — The Tides of the British Isles. 



Norwegian undulation travels to the coasts of Germany and 

 Denmark, and, becoming superimpos'ed on the wave from the 

 Channel, makes a higher undulation of 12 feet in the Jade, 

 Weser, and Elbe. 



