72 POLAR PROBLEMS 



crust or to the loading or unloading of a region by the formation or 

 removal of an ice sheet. The whole question of changes of level and 

 the splitting up of what was once a continental mass of land joining 

 Europe and America is one of great interest to the physiographer, 

 and any light thrown upon it will be most welcome to geologists and 

 geographers. 



Are There Further Islands in the 

 Arctic Archipelago? 



Explorers naturally ask whether Stefansson completed our knowl- 

 edge of the northern lands a few years ago by his discovery of a new 

 group of islands, north of the long-known Parry Islands, or whether 

 there may not be others still unknown. It seems to the present writer 

 improbable that islands of importance remain undiscovered; but, if 

 there are such, they probably rise from the continental shelf and 

 not from the deep sea toward the pole. 



