from Flemish Cap to and including the Bonavista triangle. No 

 delays were encountered from weather or other causes and the 

 67 stations were occupied between 12 and 19 June. 



The postseason cruise, 6 to 23 July (Boston to Argentia) com- 

 prising 29 stations in the occupation of the Bonavista triangle, 

 10 to 13 July, and 22 stations in the occupation of the section 

 from South Wolf Island, Labrador to Cape Farewell, Greenland, 

 15 to 20 July, was delayed 2 hours on 15 July for fathometer 

 repairs, 2V2 hours on 17-18 July for radar repairs and 19 hours 

 on 18-19 July by weather. 



The oceanographic work was under the supervision of Oceanog- 

 rapher Floyd M. Soule who was assisted by LT John E. Murray. 

 Other assistants in the observational work were Francis N. Brown, 

 yeoman first class ; Elwood C. Gray, aerographer's mate first class ; 

 Lewis M. Lawday, aerographer's mate second class ; Hugh R. Mc- 

 Cartney Jr., aerographer's mate second class; and Bruce M. Mc- 

 Cluskey, boatswain mate second class. 



Of the 299 stations occupied during the season and postseason 

 surveys, the 22 stations forming the section across the Labrador 

 Sea were occupied from the surface to as near bottom as was 

 practicable, and at the other 277 stations the observations extended 

 to about 1,500 meters where the depth of water permitted. As in 

 previous years, the intended depths of observation in meters, 

 were 0, 25, 50, 75, 100, 150, 200, 300, 400, 600, 800, 1,000 and 

 thence by 500-meter intervals. The dynamic heights have been 

 referred to the 1,000-decibar surface, except for the section across 

 the Labrador Sea where the 1,500-decibar surface has been used 

 for reference. Temperature and salinity were measured at each 

 observation level. 



Deep sea reversing thermometers were used to measure tempera- 

 tures and determine depths of observation. The protected ther- 

 mometers used were, for the most part, of Richter and Wiese 

 manufacture but a small percentage were made by Negretti and 

 Zambra, G.M. Manufacturing Co., and the Kahl Scientific Instru- 

 ment Corp. The unprotected thermometers used were made by 

 Richter and Wiese and by Kahl. The thermometers were used in 

 pairs and the individual instruments making up the pairs were 

 shifted periodically to permit intercomparison of the protected 

 thermometers. From a total of 1,993 comparisons, the probable 

 difference between the corrected readings of a pair of protected 

 thermometers was it0.010°C. Many of the thermometers had re- 

 cently been compared in the laboratory with thermometers tested 

 by the National Bureau of Standards. As in most cases the tem- 

 peratures are the means of the corrected readings of a pair of 

 thermometers it is considered that the observed temperatures listed 



36 



