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 100 

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5 o 4 o 30 2 o |° s .o°-NI° 2° 3° 4° 5° 6° 7° 8° 9° 10° 11° 12° 13° 14° 15° 16° 17° 18° 19° 



LATITUDE 



Fig. 3.-- Upper panel - direction of drift of Hugh M. Smith during period on oceano- 

 graphic stations. Center panel - surface temperatures as measured at each bathy- 

 thermograph lowering. Lower panel - bathythermograph section, northbound sec- 

 tion, Hugh M. Smith cruise 11 (stations 28-50, September 25 - October 4, 1951). 

 Isotherm interval 2, 0° F. , depths of lowering indicated by small horizontal dash. 

 Vertical dashed lines denote homogeneous water with the same temperature as 

 that of the isotherm intersected by the dashed line. 



