138 



A summary of comparisons in this locality south of the Tail brings 

 out the following facts: 



The Lahrador Current. — April 15 : The first profile at the Tail showed 

 the Labrador Current extending out 40 miles from the slope and 

 downward to a maximum depth of 275 meters (150 fathoms). 



May 4 : The Labrador Current spread 55 miles seaward on the sur- 

 face, rested on the slope to a depth of 500 metei-s (275 fathoms) , and 

 had crept in over the bottom of the Bank as an icy covering 8 

 fathoms thick. 



May 31: A shrinkage had occurred in the Labrador Current, leav- 

 ing only a small band based on the slope, which projected shelflike 

 out into warmer water a distance of 15 miles and as a bottom layer 

 in on the Bank. 



June 14: A notable increase had taken place in the volume of the 

 current from the north, which now spread 60 miles offshore from tlie 

 continental edge and bathecj the slope down to a depth of 604 meters 

 (330 fathoms) ! 



June 27: A shrinkage of the volume of the Labrador Current had 

 taken place, with a tendency of the surface layers to spread offshore 

 for 60 miles. 



The Gulf Stream. — April 15: The Gulf Stream was found in un- 

 usually large volume and strength for the season 90 miles south of 

 the Tail, with its northern face a vertical wall in the upper 400 

 fathoms. 



May 81 : It had increased in volume and strength and had advanced 

 northward as a sheer vertical wall to within 58 miles of the Tail of 

 the Bank. 



June 4: Not so prominent as in the preceding section and evi- 

 dently affected by a temporary swelling which occurred in the 

 Labrador Current. The inner edge of the Gulf Stream lay 70 miles 

 south of the Bank. 



June 27: Apparently a further retreat of the edge of the Gulf 

 Stream to 85 miles from the Tail. 



