THE WORK OF SNOW AND ICE. 



249 



moulded into almost any desired shape if carefully subjected to sufficient 

 pressure, steadily applied through long intervals of time/ These 







^ Ai 



N 



JO Miles 



Fig. 224. — Ice-caps of small size. The figure also shows some valley glaciejrs extending 

 out from the main ice-sheet and from the local ice-caps. A portion of the North 

 Greenland coast, north of Inglefield Gulf. Lat. about 78°. (Peary.) 



50 Miles ^^^P^^^ 



^^ 





Fig. 225.— Small ice-caps in the northwestern part of Iceland. (Thoraddsen'g 

 geological map of Iceland.) 



^ For an account of experiments illustrating the mobility of ice see Aitkin, Am. 

 Jour. Sci., Vols. V, p. .303, and XXXIV, p. 149, and Nature, Vol. XXXIX, p. 203. 



