59' 



58° 57° 56° 55° 54" 53° Sg° 51° 50° 49° 48° 47° 46° 45° 44° 43° 



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



Figure 12. — Ice conditions, February 1957. Figures indicate day of month ice was sighted or reported. 



J39° 



