58 



In the June current map, figure 19, the Gulf Stream has pinched 

 off the Labrador current in about latitude 44° N. It was concluded 

 from this map that there would be no further drift of ice south of 

 latitude 44° N., and that the ice patrol could safely be discontinued 

 after the area south of latitude 44° N. had been searched for ice which 

 might previously have drifted into this area. 



Out of a total of about 575 bergs for the season, but 1 was ob- 

 served to have a drift which was not in accordance with the dynamic 

 current charts. This berg drift occurred in about longitude 49 W., 

 between latitude 43° N. and 44° N., durmg May 28 to June 1, inclusive. 

 Its path can be traced on the ice maps. It will be noted that the 

 drift took place about midway in time between the May and June 

 current maps and while not in agreement with the May map it was 

 in agreement with the June map. 



In the following table of oceanographic data, those collected in 

 1931 at stations 1171 to 1219, inclusive, under the supervision of Mr. 

 Olav Mosby, have been included in order to make complete the pub- 

 lished records of stations occupied by the ice patrol in the Grand 

 Banks region. For stations taken during 1934 the corrected values 

 of the actual observations of temperature and salmity are given in 

 addition to the scaled values. The individual station headings give 

 the station number, date, geographical position, the depth of water 

 at the station from uncorrected sonic soundings based on a sounding 

 velocity of approximately 1,450 meters per second, and the dynamic 

 height of the sea surface above the reference surface used in the con- 

 struction of the dynamic topographic charts shown in figures 17, 18, 

 19, and 20. For stations 1599 to 1727, inclusive, this reference surface 

 is the 1,000-decibar level and for stations 1728 to 1770 the reference 

 surface is the 1,500-decibar level. Where the depths of scaled values 

 are enclosed in parentheses, the data are based on extrapolated vertical 

 distribution curves of temperature and salinity. The symbol (Tj 

 signifies 1,000 (density— 1). 



