57° 56° 55° 54° 53° R2° 51° 50° 49° 48° 47° 46° 45° 44° 



59° 58° 57° 56° 55° 54° 53° 52° 51° 50° 49° 48° 47° 46° 45° 44° 43° 



Figure 13.— Fifth cruise, May 9 to 24, 1939, showing surface isotherms, track of vessel, and ice conditions. (Numerals indicate day of month ice was sighted or reported.) 



220S99— 40 (Face p. 34) No. 5 



