Sy 58° 57° 56° 55° 54° 53° 52° 51° 50° 49° 48° 47° 46° 45° 44° 43' 



57° 56 55° 54° 53° 52° 51° 50° 49° 48° 47° 46° 45° 



FiGUHE 10. — Ice conditions, February 1961. Figures indicate day of month ice was sighted or reported. 



