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



Figure 43.— Tenth cruise, June 30 to July 14, 1938, showing surface isotherms, track o( Patrol vessel, and ice conditions. Figures indicate date that ice was sighted or reported. 



1474G9— 40 (Face p. 66) No. 10 



