900 



7° 6° 5° 4° 3° 2° rS-O'^N 1° 2° 3° 4° 5° 6° 7° 8° 9° 



LATITUDE 



Fig. 28. -- Upper panel. Surface temperatures, first leg (solid curves) 

 and fourth leg (broken curvp) of Hugh M. Smith cruise 15. Lower 

 panel. Smoothed (by inspection) 60°, 70^ and 80° isotherms for the 

 first leg (stations 1-17, May Z8 - June 3, 1952, solid curves) and 

 fourth leg (stations 45-60, June 14-20, 1952, broken curves) of Hugh 

 M. Smith cruise 15. 



36 



