112 



HOBBS— CHARACTERISTICS OF THE 



[April 22, 



-15.9" 



15.9 



15.4° 



-26,5° 



Nov £7 



Nov. 28. 



Nov. 2.9 



Feb 21 



-0.3" 



4.6' 



4.6° 



-B.B° 5 



■ 9jO° -x: 



be 



a 



Q 



von Drygalski within the 

 western marginal zone, was 

 found to have temperatures 

 which in the winter season 

 were normally lowest just 

 below the surface, and 

 which approximated to the 

 zero of the centigrade scale 

 at depths of generally a 

 few meters only. In Oc- 

 tober with a sub-surface 

 temperature of — ii°C. the 

 zone of zero temperature 

 was reached at a depth of a 

 little more than two meters. 

 The sub-surface tempera- 

 ture steadily lowered from 

 this time as the colder 

 months came on, and the 

 depth of zero temperature 

 descended to below the 

 limit of the experiments, 

 which was only a little more 

 than two meters. The 

 form of the temperature 

 curves in dependence upon 

 depth showed clearly, how- 

 ever, that at very moder- 

 ate depths equalization oc- 

 curred. Late in March the 

 lowest temperatures were 

 reached with — 26.3° C. 

 for the immediate sub-sur- 

 face temperature, and — 9° 

 C. for the temperature at 

 depth of two meters. Warm 

 weather at the surface re- 



