In January 1962, the oceanographic unit received an inductive 

 salinometer (Australian salinity bridge) that had been designed by 

 N. L. Brown and B. V. Hamon at Commonwealth Scientific Industrial 

 Research Organization in Sydney, Australia, and was constructed by 

 Industria Manufacturing Engineers Pty. Ltd. also in Sydney. Modi- 

 fications were made here to the siphon system to facilitate operation 

 and allow a more thorough flushing of the cell but time did not permit 

 more than a few comparisons to be made between the inductive sali- 

 nometer and the Coast Guard Wenner bridge prior to departing on 

 the Evergreen, in March for the 1962 season of oceanographic work. 

 Additional comparisons were made at sea from duplicate samples 

 taken at random, standardizing the inductive salinometer with Copen- 

 hagen water of batch P29 which was the same technique as was used 

 at Woods Hole. The inductive salinometer performed erratically 

 during all tests with readings drifting and minute bubbles present in 

 the cell. During the middle of May when the Evergreen was in 

 Boston, the inductive salinometer was further modified by the isola- 

 tion of the stirring motor, which had a tendency to overheat, from the 

 cell and a reduction of the impeller speed by approximately 80 percent. 

 This modification eliminated the bubbles but not the drifting. It is 

 believed that the temperature compensation was not adequate for the 

 larger diflferences in temperature between the cell and sample, en- 

 countered under field conditions in the Evergreen, laboratory. 



As in past years, salinities w^ere predominantly measured with a 

 Wenner salinity bridge. Prior to the beginning of the field work, two 

 check runs were made to verify the calibration cm-ve using samples 

 which had been stored in glass for 2 years after the precise chlorinity 

 determinations made in February 1960. No significant change in the 

 calibration curve was observed. In the field measurements, the 

 bridge was standardized with sea water from an oil-sealed carboy. 

 Copenhagen standard water of batch P29 was measured as unknown 

 twice during each salinity run. At the end of each survey, these 

 Jiieasurements were used to correct the tentative value of the salinity 

 of the oil-sealed carboy which had been used as a substandard of 

 salinity and to determine the corrections to the salinities for the survey. 

 The corrections indicated were as follows: first survey +0.002°/oo; 

 second survey +0.008%o; third survey +0.008%o; fourth survey 

 + 0.002%o; postseason Bonavista triangle -f0.0l8%o; Labrador Sea 

 section +0.002°/oo; the longitudinal section through station 8346 at 

 lOOjn depth — 0.00,%o; and from 150m depth at station 8346 to 

 station 8365 +0.00i%o. Difficulties with the Wenner bridge during 

 the longitudinal section of the postseason survey necessitated the 

 termination of shipboard salinity measurements and the storage of 

 water samples for tlie later detennination of salinity at Woods Hole. 

 As tliere were a limited number of citrate bottles the majority of the 

 samples were stored in some of the polyethylene bottles originally 



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