new calibration curve constructed, no positive statement can be made as 

 to which values are correct. To this end, a number of water drum samples, 

 varying from 31.5% to 36.5% , were collected during the season and it is 

 planned that a new calibration curve will be constructed prior to the 1 900 

 season. The precision with which salinities were measured is considered 

 to be about ±0.005^. 



Figures 44 through 48 show, in chronological order, the dynamic 

 topography found during the four surveys made during the season and 

 one during the occupation of the Bonavista triangle on the postseason 

 cruise. As in the past, the reference surface used was 1,000 decibars for 

 the four season cruises and the postseason triangle. It would appear that, 

 especially in the case of the fourth survey triangle, a different reference 

 level should have been used. 



Figure 48. — Dynamic topography of the sea surface relative to the L000-decibar 

 surface from data collected 1-4 August, 1959. Oceanographic station 

 positions are indicated and the station numbers given at turning points. 



105 



