at station 3811 located at 46°4T.5' N., 4-t°40' W., at 2040 on 7 May. 

 Work progressed from north toward south without serious interrup- 

 tion and the 62-station survey was completed at station 3872, located 

 at 42°41' N., 49°10' W., at 1630 on 17 May. The Evergreen then laid 

 a course for Argentia, with arrival there at 1201 on 19 ]\Iay. During 

 this cruise the deepest bottle at station 3819 dragged on bottom, where 

 the thermometer frame and the two attached reversing thermometers 

 were lost. A third thermometer was put out of action through the 

 breakage of its glass-protecting sheath during attempts to restore the 

 mercury to its proper ^oosition when gas in the thermometer separated 

 the mercury column. 



To begin a fourth cruise, the Evergreen departed Argentia at 0948 

 on 2 June. This cruise was intended to develop information regard- 

 ing current conditions in the area immediately northward of the 

 Grand Banks where the Laborador Current divides into the two 

 branches which follow the Avalon Peninsula and the eastern slope 

 of the Grand Banks. Stations were occupied along three sections 

 disposed in the shape of a triangle defined by the corners at approx- 

 imately 47°24' X., 50-00' W., 50°00' X.. 49°00' W., and 48°44' X., 

 52°58' W. (off Cape Bonavista) . The work of collection of data began 

 at station 3873, located at 47°24' X., nO^OO' W., on the morning of 

 3 June and progressed without major incident to its completion on 

 the evening of June at station 3902, located near the point of be- 

 ginning. In accordance wdth dispatch instructions from Commander, 

 International Ice Patrol, upon completion of the oceanographic 

 survey the Evergreen proceeded to relocate and drift with a berg 

 sighted by plane on 2 June at 49°24' X., 51°48' W., and on 5 June at 

 48°55' X., 51°25' W. The berg was reached on the afternoon of 



7 June and departure was taken from the berg on the afternoon of 



8 June for Argentia, with arrival there at 2042 on 9 June. 



As the ice-patrol season was terminated on 15 June, the next cruise 

 of the Evergreen was considered to be the postseason cruise, part one. 

 The Evergreen departed xVrgentia at 1028 on 16 June to repeat the 

 triangular survey of the fourth cruise to learn something of the 

 stability of the circulation pattern in the vicinity of the branch point 

 of the Labrador Current included in the triangle. The work of col- 

 lection of data began on the morning of 17 June at station 3903 at 

 the southern corner of the triangle and progressed without major 

 incident around the triangle in a counterclockwise direction, the final 

 station, number 3932, being completed on the afternoon of 20 June 

 near the point of beginning. The Evergreen then laid a course for 

 Argentia, with arrival there at 1658 on 21 June. 



At 2102 on 2 July, the Evergreen departed Argentia on the second 

 and final part of the postseason cruise. It had been planned to occupy 

 a section across the Labrador Sea from South AVolf Island, Labrador, 



53 



