384 Mr Lawson on the Trade-Winds of Bardadoes, 



found to agree much more closely with the above statements, 

 not only as to direction, but also as to the time of their 

 occurrence, than any laid down on the principles of true ro- 

 tation.* 



Fig. 3, shewing the directions of the wind during the Barbadoes hurricane of 

 1831, on 11th August, at 7 a.m. 



84. A gentleman named Giltens, residing at Barbadoes, 

 prognosticated the occurrence of this hurricane at 4 P.M. on 

 the 10th. The chief indication he relied on seems to have been 

 " the darting forward of the clouds with flat irregular motion, 

 not borne by the wind, but driven as it were before it." t 



85. It may be asked how, if the first phenomena of a hurri- 

 cane consist merely of an acceleration of the trade-winds, 

 this should not have been experienced in the above instance at 

 St Vincent, as well as at St Lucia. There is, unfortunately, 

 no account of the state of the weather at St Vincent previ- 

 ous to the commencement of the hurricane, but from colla- 

 teral evidence the force of the wind does not seem to have 

 been unusual. The distance from the northern extremity of 

 St Lucia to the middle of St Vincent is about 60 miles, and 

 though the hurricane might have been raging with great 

 violence from NNE. or NE. at the former place, still as the 



* If the lines indicating the direction of the wind be taken off on tracing paper, 

 and this moved along the track of the storm so as to bring the point C over its 

 place for any given hour, the direction of the wind, at that hour, will be im- 

 mediately seen at every point within its range. t Keid, p. 36. 



