58° 57° 56° 55° 54 ° 53° 



51° /.^0° 49° 48° 47° 46° 45° 44° 



59° 58° 57° 56° 55° 54° 53° 52° 51° 50° ^9° 48° ' ^T 46°^ 45° 44° 43° 



FiQUKE 22.-Fourth cruise, May 5 to 18, 1936, showing surface isotherms, ice conditions, and tracif of vessel. Numbers indicate day on which Ice was sighted or reported. 



149346— 3S (Face p. 24) No. 4 



