Between Cape May and Madeira. 



71 



Passing along the section from west to east, we find inside 

 the Gulf Stream an area of colder water extending from 

 Station 41 to Station 39, then a streak of warmer water at 

 Station 38, and one of colder water at Station 37, westward 

 of Bermudas. These currents of colder water are probably 

 a continuation of the streaks of low temperature met with 

 between Halifax and the latter islands. At Station 57, off Ber- 

 mudas, we enter an area of warm water of nearly the same 

 temperature as the Gulf Stream, which can be traced as far as 

 Station 60. Another area of the same temperature is met with 

 further east at Station 64 and Station 65. The nearly uniform 

 surface-temperature, varying from 21° to 22° C., found between 

 these areas and in the rest of the section as far as Station 82, 

 may be considered as the surface-temperature of this region of 

 the North Atlantic in the months of June and July. The undu- 

 lating level of the isotherms of 15°, 10°, and 5° C. betrays the 

 struggle going on between contending currents, the warm water 

 retaining the upper hand until we reach Station 71, on the 

 western slope of the plateau of the Azores. This Station, like 

 Station 10 on the eastern slope of the same plateau in the 

 section between Teneriffe and Sombrero (Plate 6), fixes the 

 limit between two areas totally different as regards the dis- 



