59° 58° 57° 56° 55° 54° 53° 52° 51° 50° 49° 48° 47 



Figure ll— Third cruisp, ice patrol, Acushnel, 2-20 May 1950, showing surface isotherms. 



46° 45° 44° 43° 



955984 O - 51 (Face p. 20) No. 4 



