Mr Lawson on the Trade-Winds at Barbadoes. 137 



stowed considerably more care on the subject, generally ex- 

 amining the state of the clouds at 9 A.M. and 3 p.m., and 

 again at 9 P.M., when there was sufficient light to admit of a 

 satisfactory conclusion being formed. 



10. By the above means, three currents were generally found 

 to exist in the atmosphere at Barbadoes, and occasionally a 

 fourth. These were, — \st. The regular trade wind below ; 

 2d, The equatorial or returning current above ; 3^/, A middle 

 current, from ESE. or SE. to SSE. and S. ;-and, Ath, A current 

 which seemed to be placed higher in the atmosphere than the 

 last, though below the equatorial one, and which came from 

 NW. to NNW. or N. 



11. The trade is the usual wind at Barbadoes ; it commonly 

 blows from the ENE. or E., though, in this respect, it differs 

 a good deal. The following table, in which all the recorded 

 observations on its direction at 9 A.M., 3 P.M., and 9 P.M., are 

 arranged, so as to shew the effect of season, will indicate this 

 more plainly : — 



Tabic, shewing the number of times the ivind blew from each point 

 of the compass at 9 a.m., 3 p.m., and 9 p.m., at Barbadoes, 

 during each month, from 3Iay 1841 to January 1842 (bearings 



true.) 



A glance at the totals in the last column will shew, that, on 

 the whole period, the winds from E. to NE. were by far tho 

 most prevalent ; but this docs not apply to the months taken 

 singly. 



