144 National Geographic Magazine. 



ing about S. S. E. \ E. for V hours and K N. W. \ W. for a little 

 over 5 hours. 



The first section investigated in 1888 was in the equatorial 

 drift between Tobago and Barbados, where seven stations were 

 occupied. The axis of the stream was found west of the middle, 

 or nearer the South American shore, and the average direction was 

 towards the north. At none of the stations did the current set in 

 the direction of the wind, although the trades were blowing at 

 all times with a force of from 2 to 1. The daily variation was 

 also here very pronounced, the average time of maximum flow 

 occurring about 5'^ 56'" after the moon's transit. At 65 and 130 

 fathoms depth the current, at three of the stations occupied, was 

 north-westerly; at one south-easterly. The velocity at 130 fath- 

 oms was greater than at 65 fathoms, and greater at the surface 

 than at 15 and 30 fathoms. 



At all of the three stations between Grenada and Trinidad 

 tidal action was observed, with deflections due to local influences. 



The passage between Santa Lucia and St. Vincent appears to 

 be in the line of the equatorial stream. At each of the five sta- 

 tions in this passage tidal action was pronounced, the currents 

 setting in and out of the Caribbean Sea at some depth. The 

 daily variation in this passage reaches a maximum at about 6'^ 3"^ 

 after the moon's transit, and a minimum when the moon is on the 

 meridian. The currents entering the Caribbean Sea through this 

 passage are but 100 fathoms in depth, but there is probably an 

 almost equal volume flowing out below that depth. 



Between the Windward Islands the currents flow generally 

 westward, but tidal action is everywhere apparent. 



To the east of Desirade the currents at all observed depths 

 have a northerly direction, fluctuating between about N. E. by 

 E. to N. W. by N. 



In the eastern part of the Anegada Passage the surface current 

 flows into the Caribbean Sea in directions varying between S. S. 

 W. and S. E., but the submarine current down to 130 fathoms 

 flows in a direction lying between north and east. 



In the more western part of the passage the currents are more 

 complex, apparently on account of the greater variations in depth 

 in the vicinity of the station occupied. 



In the Mona Passage no regular currents were perceptible. 

 Between Mona and Puerto Rico the currents observed set out 

 of the Caribbean Sea, varying in direction from about W. by N. 



