Survey of Northeast Greenland. 453 
strike against the coast land, which particularly in May and June is 
relatively very cold, the moisture condenses into fog. This fog is 
therefore, particularly in the early summer, characteristic of the 
outer coast. It was this fog which in 1900 forced PEAry to stop at 
829577, when towards the end of May he attempted to travel south 
along the east coast of Peary Land. It was likewise this fog which 
during the latter half of May and June 1907 so greatly hindered the 
sledge travellers of the Danmark-Ekspedition on the whole stretch 
from Kap Bridgman to Danmarks Havn. The easterly winds often 
lack the force to penetrate far across the land; consequently one 
often sees that the fog only lies above the outermost coast land and 
at the mouths of the fjords; and even in the rarer cases, where the 
fog has sufficient strength to reach as far as the margin of the in- 
land ice, does one as a rule see the great areas of plateaus and 
mountain ranges projecting through the fog. 
Thus the easterly winds are, particularly during the early summer, 
a rather important factor in the climate of the outer coast; but ac- 
cording as we move away from the outermost coast line or ascend 
the mountains, the importance diminishes, and at the margin of the 
inland ice or at an altitude of 300m the easterly winds and the 
accompanying fog are practically played out, which circumstance, as 
we shall see below, leaves its traces on nature. 
The extent to which the westerly winds prevail, when from the 
margin of the inland ice one goes farther west, in across Dronning 
Louises Land and the inland ice, was borne in upon us during the 
voyage across Greenland in 1913. On April 20th we left Borg (about 
22°30’ west of Grw.; on May 3lst we had practically reached the 
centre of Greenland (about 38° west of Grw.). During these forty 
days we had had no easterly winds at all, and only two days of 
moderate winds or calm. During the remaining thirty-eight days we 
had had a stiff westerly breeze, which for twelve days forced us to 
lie over. ; 
With the exception of. the three summer months, the wind, when 
it has a velocity of more than 5 to 6m, nearly always causes the 
snow to drift. The drifting of quite fine and loose snow has, it is 
true, been observed under smaller velocities of the wind; but the 
carriage of snow, caused in this manner, is of no practical importance. 
At a velocity of 6 to 7m the drifting on more even planes, for in- 
stance on the fjords, assumes quite a regular character without, 
however, rising more than a few decimetres above the ground. In 
these cases the drift of the snow is not evenly distributed, but lies 
in winding streaks, which are driven before the wind, not unlike a 
thin white smoke. These streaks occur as.a natural consequence of 
