464 I. P. Косн. 
air,”) which formed over the thin ice sheet of the fjord. It tried to 
impart a little life to the dull and sluggish icebergs, but the task 
was too hard for it. It missed the assistance of its strong brother, 
the upward ог the “spring* mirage. When the latter sets to work, 
the icebergs become frolicsome and wanton. 
. Borgjekelen?) April 12th 1913. 
— — — When we got further east, down over the Borgjgkelen, 
we passed the boundary between two sharply separated strata of 
air, and immediately the mountains round us began to be reflected. 
Fig. 149. The left mock-sun and parts of the small halo and the horizontal 
ring projected against Stjernefjeldene. Pustervig, Germania Land. March. 
It was the “spring mirage”, which here imported life to quiescent 
nature. 
And while the sledges were going up and down along the un- 
even, hummocky ice, the character of the images changed. 
From Kap Aage Berthelsen a reflected streak projected towards 
Gundahls Knold. It undulated backwards and forwards, split up 
into two parallel parts which again joined together, all at once 
thrust out a quivering tongue far towards north, and then with the 
same suddenness withdrew it into the solid mountain side. 
The mountain north of Gundahls Knold rose on tall and slender 
columns. Column beside column made a continuous airy wall, 
which upheld the natural domelike top of the mountain. 
1) This expression is, as will be seen, not exact. 
*) A large glacier, stretching from west to east across Dronning Louises Land. 
