59» 58° Sr 56» 55° 54° 53° . 52° 51° 50° 49? 48° 47 ° 46' 



45° 44° 43° 



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



FIGURE 1.— ICE CONDITIONS, FEBRUARY-MARCH. 1952, AND SURFACE ISOTHERMS FOR 



THE PERIOD 4-31 MARCH, 1952. 



260173 O - 54 (Face p. 12) No. 1 



