49 



with the Labrador current, at the eastern slope of the Grand Banks, 

 and they reached tlie forty-third parallel on May 13. The distance 

 traveled during these days is about 90 miles, the velocity thus averag- 

 ing about 30 miles a day. This drift is in good accordance with the 

 above-mentioned calculated velocities, namely, 20 miles a day be- 

 tween the stations 1399 and 1400, and 33 miles a day between the 

 stations 1404 and 1405. From 43° latitude north and about 49° 15' 

 longitude west the bergs moved westward; and on the 20th and 

 21st of May they were sighted west of the fifty-first meridian, and 

 on a latitude of about 42° 40' N. The distance traveled since May 

 13 was about 90 miles, which gives an average speed of travel of 

 about 13 miles a day. The calculated velocity on the current map 

 was 18 miles a day between the stations 1416 and 1417. After the 

 21st of May the bergs drifted slowly around in the region between 

 42° and 43° N. and 51° and 52° W. One of the bergs (indicated by 

 the white triangle) took a northerly course and was last seen sighted 

 on May 26 just north of 43° N. and on about 51° 40' W. The other 

 berg (the black triangle) drifted slowly southward, and w^as sighted 

 on May 28 on a latitude 41° 45' N., longitude 50° 20' W. From this 

 position it drifted eastward and northeastward, was again reported on 

 42° N. and 48° W. on June 3. 



One might have expected to find a more southwesterly drift after 

 the bergs had passed the fiftieth meridian, and find them more in the 

 same direction as the curves on the map. The wind may, however, 

 had some influence on the drift by this occasion, and further, the 

 positions of the stations 1422 and 1423 are not accurate. Probably 

 the location of the stations are several miles further west than where 

 they are on the current map. A more westerly position of these two 

 stations will change the directions of the curves a little. 



During the period of May 20 to 26 the two bergs drifted in an area 

 with weak currents, and their drift was irregular, certainly influenced 

 by wind and tides. That one of the bergs (white triangle) moved 

 northward, the other in general southward, maj- be due to some 

 accidental circumstances, the explanation of which is not to be 

 found from the current map. One, of the bergs (black triangle) was 

 caught by the Gulf Stream and carried eastward. From May 28 to 

 June 3 it traA-eled about 115 miles, which gives it an average speed 

 of 19 miles a day. The calculated velocity of the current between 

 the stations 1419 and 1420 was 18 miles a da3^ 



The berg drifted toward northeast on May 28. This movement 

 corresponds to the direction of the curves for 970.90, 970.92, 970.94 

 dynamic centimeters. It is possible that the other curves for 970.96, 

 970.98, 971.00, etc., ought to have been drawn in a similar way. 

 The exact course of the iceberg between May 28 and June 3 is not 

 known, because the ice-patrol cutters did not drift with the berg 



