59° 58° 57° 56° 55° 54° ^:^°^ 52° g'° '^° . '^° 48° 47° 46° 45 



44° 43° 



48° 47° 46° 45° 44° 43° 



Figure 9.— Second ice observation cruise, first part, Mendota, 30 May to 1 1 June 1947, showing surface isotherms. 8277U o - 49 (Face p. 32) No. 3 



