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PLATE LXXIV. ANTAECTIC ICEBERGS. 



FIG. 1. From a photograph by R. W. SKELTON (S. 110, 5" x 4" plate), Feb. 

 1904 ; taken on the voyage home, off the coast of South Victoria Land ; 

 a water- worn iceberg. 



FIG. 2 (Map B). From a photograph by R. W. SKELTON (Sk. 210, ^-plate), Nov. 5, 

 1902 ; taken in M'Murdo Sound ; a weather-worn iceberg. 



These two figures contrast two different types of disintegrating iceberg. 

 Fig. 1 shows typical water-worn caves in a tabular berg, and it will easily be 

 understood that an undermining process such as this will be far more rapid than 

 any process which attacks it from above, as, for example, in Figure 2, where the 

 berg, frozen into sea-ice, remains for years exposed only to wind and the sculpturing 

 action of snowdrift above sea-level. Except where there is grit or dirt in the ice, 

 the sun's melting effect is practically negligible, even in the height of summer, 

 though evaporation is active. 



