36 MARIOjST expedition to DAVIS STRAIT AND BAFFIN BAY 



r 



The Varying Bounds of Pack Ice 



1 FiGUHE lil. — TIsc annual iiiaximnin, iniiiinniin. and mean limits to wiiicli jiack in' in sub- 

 stanrial v(iliini<' lias liccn iTconlrd over a i)eri()<l of years. Tlie data for the pack ii't' lu 

 the cast (irccnlaiid current lias been taken from a IH-vcar record of the Danish Mete- 

 oroldfAual Institute. The data for the ice in the Labrador current conies freiii the 

 international ice patrol an<l other sources. 



