58° 57° 56° 55' 54° 53° 52° 51° ^a 50° ha 



48° 



47° 



43° 



^^ 59° 58= 5 7° '"56^ 55^ 54° sa" o^ a. au- ^y- 43" 47- 46. 45. - 44. 43. 



"•-Surface isotherms and ice conditions May 13-26, 1934. Traclc of patrol vessel omitted on account of congestion. Isotiierns are based on 1,278 temperature reports. Numbers Indicate day on wbich ice was reported. 



98591—36. (Face p. 18.) No. 4 



