THE CLOSING OF THE STATION 



the distance. We know that the surface winds 

 always blow outward from an interior area of 

 calms down the slope, though deviated always by 

 earth rotation in a direction the same as that of 

 clock motion. Such a circulation of surface winds 

 implies of course an interior area of calms where 

 the air is settling, and such calm conditions ac- 

 companied by intense cold have been encountered 

 in the interior by those explorers who have already 

 crossed the ice-cap on sled journeys. 



Our studies with balloons on the southwest coast 

 have told us that there are at higher levels in-blow- 

 ing winds, and one expedition in far northeastern 

 Greenland has shown the presence of such higher 

 in-blowing winds on that side of the ice-cap. We 

 lack as yet in published works satisfactory observa- 

 tions from the southeast coast of Greenland, but 

 there is reason to believe that the high in-blowing 

 winds will there be found and that the entire 

 circulation over the ice-cap is similar to the out- 

 line of an hour-glass. (See p. 47.) 



365 



