A third survey similar to the first, and a fourth survey similar to 

 the second were conducted as one survey. The work of collection of 

 data began on 23 May and progressed from south to north to a point 

 north-northwest of Flemish Cap at station 8218 where the survey 

 was temporarily halted while the Evergreen proceeded to St. Johns, 

 Newfoundland. After a 24 hour stay the Evergreen left St. Johns 

 and proceeded to the next station. No. 8219, to complete the fourth 

 survey with a total time loss of 76 hours between the two stations. 

 The survey was completed on 13 June at station 8269, whereupon the 

 Evergreen returned to Boston, Mass. During the course of the thii'd 

 survey the Evergreen diverted from section T to retrieve the moored 

 current meters of which only two were recovered. 



A postseason survey was planned to include, in addition to the 

 normal occupation of the Bonavista triangle and Labrador Sea 

 section from South Wolf Island, Labrador, to Cape Farewell, Green- 

 land, a longitudinal section through Davis Strait from the Labrador 

 Sea section to southern Baffin Bay with a transverse section in the 

 Labrador Sea from Loks Land to Fyllas Bank and a transverse section 

 in Baffin Bay from Cape Henry Kater to the Nugssuag Peninsula. 

 The Evergreen arrived at the first station. No. 8270, on 9 July and 

 commenced taking oceanographic stations. The Bonavista triangle 

 was completed on 12 July and the Evergreen then proceeded to South 

 Wolf Island where the work of collection of data on the Labrador 

 Sea section was begun at station 8300 on the following day. In 

 addition to the normal work of collecting temperature and salinity 

 data on the Labrador wSea and Davis Strait sections, oxygen determina- 

 tions were made for all depths at all stations occupied excluding surface 

 water, with a total of 1,858 determinations being made using a 

 modification of the Winkler method. A total of 595 water samples 

 were also collected and frozen in 8-ounce polyethylene bottles for the 

 determination of nitrate, nitrite, silicate and phosphate content by 

 the Woods Hole Oceanographic Institution. Completion of the 

 Labrador Sea section was accomplished on 17 July with station 8323 

 at Cape Farewell, Greenland. The Evergreen then proceeded to station 

 8324 located at 58°04' N., 49°25' W., and began the longitudinal sec- 

 tion. Stations were occupied in a northwest direction to station 8332, 

 located at 62°48' N., 56°15' W^ The Evergreen then interrupted the 

 longitudinal section to run the transverse section from North Foreland 

 on Hall Island off Loks Land near Frobisher Bay, Baffin Island, in an 

 easterly direction to station 8349, located near Ravne Island off 

 Godthaab, Greenland. The Evergreen then proceeded to station 

 8350 located at 63°58' N., 56°52' W. and station occupation was 

 again resumed in a northerly direction to station 8368 located at 

 69°15' N., 62°45' W. The Evergreen then proceeded to station 8369 

 located off Cape Henry Kater on Baffin Island and ran the transverse 

 section in an easterly direction to the last station of the survey, No. 



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