ICEBERGS AND ANCHOR ICE. 



75 



and in 1854 an enormous group of icebergs was seen, 

 locked together and forming a great hook sixty miles long 

 and forty broad, no part of which, however, rose more 

 than 300 feet above the sea. 



Fig. 18. BROKEN-UP BERGS. 



Besides the icebergs born of glaciers, there are others 

 of a different origin, for the sea itself often freezes in the 

 Arctic regions, along the base of the lofty cliffs, where the 

 water is less salt, owing to the large quantities of snow 

 which drift into it from the shore. At low water the ice 

 thus formed often freezes to the bottom, whence it is 



