Pihvood C. Gray and Richard C. Norris, aerographer's nuttes first class, 

 William G. Carpenter, yeoman second class, Lynn E. Dawson and 

 Donald P. Wagner, aerographer's mates third class. Temperature and 

 salinity observations were made at each of the 394 stations. At the 24 

 stations forming the section across the Labrador Sea the observations 

 extended from the surface to as near the bottom as was practicable. At 

 the remaining stations the observations were limited to the upper 1500 

 meters. The intended depths of observations, in meters, were 0, 25, 50, 

 75, 100, 150, 200, 300, 400, (300, 800, 1,000, and thence by 500-meter 

 intervals. 



Temperatures were measured with protected deep sea reversing ther- 

 mometers, mostly of Richter & Wiese manufacture but with some manu- 

 factured by Negretti & Zambra, G. M. Manufacturing Co. and Kahl 

 Scientific Inst. Corp. Depths of observation are based on unprotected 

 reversing thermometers made by Richter & Wiese and by Kahl. As in 

 other years, a program of intercomparison of protected thermometers 

 was carried out in the field measurements. The thermometers were used 

 in pairs and one of each pair was shifted periodically so that the same 

 thermometer was eventually paired with a number of other thermometers. 

 From a total of 2,668 intercomparisons, the probable difference between 

 the corrected readings of a pair of protected thermometers was 0.01 °C. 

 Of these comparisons, 343 involved thermometers having a range of +3° 

 to + 13° with a probable difference of 0.006°, 1 ,587 comparisons between 

 thermometers of range —2° to +8° and gave a probable difference of 

 0.009°, and 738 comparisons were between thermometers with a range of 

 — 2° to +20° or greater and gave a probable difference of 0.014°. As most 

 of the temperatures listed in the Table of Oceanographic Data are the 

 means of the corrected readings of a pair of thermometers and since 

 many of the thermometers used had recent laboratory comparisons with 

 thermometers tested by the National Bureau of Standards, it is con- 

 sidered that the tabulated observed temperatures are good to 0.0 1°C. 



As in previous years, routine salinity measurements were made with a 

 Wenner salinity bridge. Prior to the 1959 season it was planned to con- 

 struct a new calibration curve by titration of a number of large volume 

 water samples collected at sea and then make a series of runs on the 

 salinity bridge. Unfortunately, the water froze in its containers before 

 this could be done. Consequently, a single carboy of water, designated 

 C-l-59, w r as titrated 12 times with the result that when a series of com- 

 parisons was made on the salinity bridge between the water of C-l-59 

 and Copenhagan standard water of batch P23, a new reading for the P23 

 was determined. By using the new reading, a discrepancy of +0.03i% 

 is introduced between the 1959 and 1958 salinity values. It is noted that 

 this discrepancy is the same that existed between the WHOI and the 

 CGOU salinity bridges, as reported in Bulletin Xo. 44 of this series; 

 however, until a number of titrations can be made on a series of large- 

 volume water samples, covering the salinity range of the bridge, and a 



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