72 1 



although it was finished 9 hours after the last station had been com- 

 pleted, delivery could not be effected until the Mendota could be 

 contacted the next morning, May 10. After the map was delivered 

 aboard the patrol cutter, the General Greene proceeded to St. John's 

 where she arrived on May 11. 



The General Greene departed from St. Jolm's on May 25 to make a 

 third current survey. The reported distribution of what few bergs 

 seemed destined to travel the eastern branch of the Labrador Current 

 indicated that current information was desirable from the area east 

 of the Grand Banks and immediately northward of latitude 47° N., 

 in addition to information from the usually surveyed area to the 

 southward. Therefore, the work of collection of data was begun at 

 station 2390, located near the northwestern edge of Flemish Cap, on 

 May 26. Work progressed without major interruption and was 

 completed at station 2465 at 43°25' N., 50°09' W., on June 6, after 

 76 stations had been occupied. The resulting current map was then 

 constructed and was delivered aboard the Mendota 18^ hours after 

 completion of the last station. The General Greene then proceeded 

 to St. Jolm's arriving there on June 8. 



Thus 201 oceanographic stations were occupied during the ice- 

 patrol season. Between June 21 and July 12 an additional 75 sta- 

 tions were occupied on a post-season cruise which involved six sections 

 approximately normal to the Labrador and Atlantic Currents and 

 designed to cross their common boundary at intervals from the Tail 

 of the Grand Banks to northeast of Flemish Cap. The temperature 

 and salinity data collected at the 276 oceanograpliic stations occupied 

 during the season and on the post-season cruise are presented in the 

 oceanograpliic table in tliis bulletin. 



On the post-season cruise, 843 sonic soundings were made with the 

 fathometer. These have been corrected for sounding velocity by 

 means of the concurrently collected temperature and salinity data 

 in accordance with the temperature-salinity-pressure-velocity rela- 

 tions given in the British Admiralty tables (H. D. 282). The cor- 

 rected soundings have been tabulated and forwarded to the United 

 States Hydrographic Office and to the International Hydrographic 

 Bureau. 



During the ice season, and in continuation of cooperation with the 

 Fisheries Research Laboratory of the Newfoundland Department of 

 Natural Resources, abstracts of temperatures and salinities measured 

 were forwarded to that laboratory promptly upon the return of the 

 General Greene to St. John's at the conclusion of each survey. Other 

 incidental data collected on the General Greene consisted of barograms 

 and sea-water surface thermograms. 



The equipment and methods of measurements were the same as in 

 1936. Routine salinity bridge measurements and calibration titra- 



