Fig. 10 



Fig. II 



Fig 10 — Slush or sludge forming between the open water in the foreground and the young ice in 

 the background. Near Cape Chelyuskin, Siberia. (Photograph from Russian Hydrographical Expe- 

 dition to the Arctic.) 



Fig. II — Pancake ice, Ross Sea sector of the Antarctic. (Photograph by H. G. Ponting in Wright 

 and Priestley's " Glaciology, " PI. 230.) 



107 



