INTERNATIONAL ICE OBSERVATION AND ICE PATROL SERVICE. 65 



During the last days of the patrol a berg, berg "S," chart "G," 

 was observed to drift southward past the Tail of the Bank and through 

 the "cold wall" into very warm water. It reached the southern- 

 most limit of ice for the year, 41° 05' N., 51° 28' W., before it had 

 melted to a size when it would no longer be a menace to navigation. 

 This ber^ evidently was caught by Gulf Stream water escaping out 

 of the bi^ht which had formed to the westward of the Tad of the 

 Bank and was carried south in a band of southerly current until 

 caught by the main body of the Gulf Stream, when it quickly disin- 

 tegrated. This is an example of a situation that may occur and shows 

 that the extraordinary drift of ice to low latitudes in the North 

 Atlantic is probably due to temporary surface branches of warm 

 water moving south in contradistinction to an abnormal polar current. 



To sum up : There were seven bergs south of the Tail of the Bank 

 during this period, one of which drifted to the farthest southern 

 position for ice during 1922. Fog was present 46. per cent of the 

 period. 



