636 



Researches on the Gale and Hurricane [[August, 



.1839. 



Bar. at 



10| A. M. 



Ther. 

 attached 



Bar. at 



4| P. M. 



Ther. 

 attached 



Bar. at 



10 p.m. 



Ther. 



Remarks. 



June 4th 

 5 

 6 

 7 



8 



9 



10 

 11 

 12 

 13 

 14 

 15 



No obsc 

 29-50 

 29 42 

 29-32 



29-30 



29-34 

 29-40 

 29-39 

 29-38 

 29-38 

 29-47 

 29-58 



'rvation. 

 86 

 86* 

 83 



84 



8l| 



82 

 83 

 85 

 85 

 87 

 87 



29-32 



82i 



• • • • 



.... 



1 Strong and con- 

 f tinued gale from 

 C East, with occa- 

 1 sional rain. 

 S Rain; wind SW. 

 1 shifting to West. 

 Ditto, W. do. to NE. 

 Ditto, Wind SE. 

 Ditto, SW. 

 Ditto, W. 

 Ditto, W. 

 Ditto, NE. 

 Ditto, EbN. 



East, the usual di- 

 rection of the wind 

 at this season. 



N. B. This gale extended in breadth from Mootebarry, 60 miles North of Chuprah, 

 to Gyah, 90 miles South— and perhaps further, but of this I have no authentic in- 

 telligence. 



As far then as our present knowledge extends, and referring to the 

 state of the Gale in the Southern part of the Bay, we find that the 

 impulse, which may be said to begin to be violently felt on the 31st by 

 the Susan, did not reach Chuprah till the 4th, when it produced an 

 Easterly Gale, terminating on the 7th, shifting to the South- West and 

 West on the 8th ; the counter-gale and eddies, if we may so call them, 

 being only the irregular movements of the various currents produced by 

 this great derangement of the usual equilibrium of the aerial currents, 

 which, as is remarked, are usually from the East at this season ; affording 

 also a proof towards the theory which I have ventured to offer. When 

 the monsoon slackens the Southerly and South-Westerly gales, and cur- 

 rents may find their way as far inland as this place. The dates show 

 that the Gale did not begin at the point to which it blew, but that 

 it was a progressive impulse travelling about the direction which I 

 have laid down. Assuming this theory as a guide only, let us now see 

 how it accords with the facts we already possess here. By referring 

 to the Map, No. II. we see that though along the coast from Madras 

 to Vizagapatam, by the Indian Oak's log at Masulipatam, by the 

 Master Attendant's report from Coringa, and up to the 3rd at noon 

 by the Laurel Amelia's log, it was fine, though threatening ; yet 

 from the 31st May to the 5th June, by the logs of the Lady Macnaghten, 

 Petrel, Susan, Jumna, and Laurel Amelia — to which too we might 

 add those of the Nine, Eden, and Mobile — a severe gale was blowing 

 between WbS. and SW. diagonally across the Bay, in lines about 

 parallel to one drawn from the centre of Ceylon to Cape Negrais, the 

 termination of the Arracan coast. We find that at Cheduba on the 



