SCIENTIFIC UESITLTS 



15 



Slush and Sludge Begins to Form 



Figure 3. — The initial stages in the freezing of sea water. Slush and sludge of 

 soupy consistency is forming in the spaces between the old glagons. (Photograph 

 by H. G. Ponting in the Scientific Reports of the British Antarctic Expedition.) 



Young Ice 



Figure 4. — Glafons of young ice which will soon cement together again in a con- 

 tinuous sheet with the further advance of winter temperatures. The several small 

 circular cakes with the raised rims which compose the glagons are called pancake 

 ice from their close resemldance to " pancakes." This form represents the inter- 

 mediate step in ice formation between slush and young ice. (Photograph by 

 H. G. Ponting in the Scientific Reports of the British Antarctic Expedition, i 



