84 



ing features are the location and the shape of the elongated body of 

 water less than 2° C. and the irregular inner edge of the warm off- 

 shore water as outHned by the 10° C. isotherm. The distribution 

 of salinity at the 50-meter level (see fig. 44), when compared with 

 Figure 43, indicates plainly that the water in closest to the Bank was 

 Labrador current and the water farthest out in the basin was warm 

 salty Atlantic. 



The last week in May we searched along the eastern side of the 

 Bank in the cold current and ascertained that there was no ice south 

 of the forty-sixth parallel. Several bergs, however, were on the 



?3 St, S^\ SD 49 '^% ^"^ 4t ^S- ''4 



FiQ. 44.— Set III. The distribution of the salinity at the 50-meter level, May 10-18, 1927 



SET IV 



northeastern slope, the largest group that had been in that locality 

 during the season. It appeared probable, therefore, that they might 

 drift farther south along the edge of the Bank, in which case a recent 

 survey of the currents would be liighly desirable. 



Figure 45 is a dynamic topographic map obtained from investiga- 

 tions carried on May 29 to June 3, and is based upon a total of 31 

 stations. The striking feature of the picture is an elliptically shaped 

 depression, as outlined by the dynamic isobath of 728.60 dynamic 

 meters, which lay centered on the eastern side of the Grand Bank 

 near the forty-fifth parallel. High aquain rose on all sides except to 

 the north, in which direction a trough extended to the limit of the 

 observations. 



