NORWEGIAN GLACIERS. 



93 



the Glacier of the Mjölkedal (M), which, by projecting right across 

 a small valley, protrudes into the Lower Lake of Mjölkedal (n), 

 at the same time damming up the water of the Upper Lake of 

 Mjölkedal (ø), which during these periods, is drained towards the 

 north into the Valley of the Upper Mjölkedal. Now and then, 

 apparently at rather irregular intervals, the waters of this ice- 

 dammed lake force their way through the glacier. The occur- 

 rence of these violent overflows may, however, be regarded as 

 rather closely connected with the variation of glaciers in a man- 

 ner quite usual as regards the phenomenon of ice-dammed lakes. 



The Snow-field of the Uranaas and the Upper Lake of Mjölkedal. 



With regard to glacier oscillation in our central region of 

 High Mountains, the Jotunheim, we have been able to obtain 

 some few records indicating the same fact that is evinced by the 



