22 



Courses were run a little farther north, then east, and finally south 

 to return to the two tall bergs seen on the preceding day. When 

 fog shut in early in the afternoon it was realized that these bergs 

 could not be relocated, so stations were taken in toward the Bank 

 until 11.30 p. m. 



On the morning of the 19th, it still being quite foggy, a row of six 

 stations was run cautiously to the southeast from the shoal water 

 in 43° 33' N., 49° 32' W. Arctic water was found extending east only 



20 miles from the 100-fathom curve. From that point a mixed water 

 was encountered at all levels. Forty miles southeast of the Banks 

 the sea surface was 46° F. 



At about 4 p. m. a course of 270° true was set for the Tail. Visibil- 

 ity was fair because the haze and fog were soon dissipated after the 

 wind backed from Northeast to Northwest around 1 p. m. Neither 

 of the two large bergs that were 30 miles to the north two days pre- 

 viously were sighted. 



On the 20th the weather was still overcast and the moderate 

 Northwest gale that commenced shortly after the wind backed on 

 the 19th was still blowing. Search courses were run to the north and 

 then to the west, but no ice was seen. The night was spent running 

 slowly from the vicinity of the Tad toward the Mojare. That vessel 

 was met and the relief of the patrol was effected at 9 a. m. on May 



21 in 43° 00' N., 51° 00' W. 



During the fourth cruise, 27 oceanographic stations were taken. 

 It was found that water below 0° C. was limited in amount, being 

 confined about the Tail to the lower levels of a narrow band. This 

 would seem to indicate a small supply from the north. The weather 

 was moderate but foggy. The only time that the wind attained gale 

 force was during the storm of the 19th and 20th. Visibility of less 

 than 2 miles was experienced during 153 hours, nearly 43 per cent of 

 the time. 



Altogether 137 ice reports were received from ship and shore sta- 

 tions. Six logs and minor items of wreckage were reported bj^ steam- 

 ers from south of the forty-third parallel. Three similar drifting 

 objects were reported from farther north. 



One hmidred and sixty three vessels cooperated by sending in 

 1,153 water temperature reports. During the cruise 23 vessels were 

 furnished special ice information on request. 



Only eight different bergs were sighted or reported during the 

 cruise south of 45° 30' N. Those that reached the latitude of the 

 Tail showed a tendency to drift south without curving either to the 

 east or west. One of these, before entirely disentegrating. reached 

 the low latitude of 40° 19' N., in the longitude of 47° 51' W. 



Prolonged periods of fog kept the patrol vessel from following 

 closely the final drifts of the three bergs that were seen south of the 



