644 A Sixth Memoir on the Law of Storms in India. [No. 127. 



steering North, 5, 6, and 7 knots, heavy confused sea. 11 p. m. hard 

 squalls and sharp lightning. 



9tk September. — 2 p. m. W. S. W. going 5 and 6 knots to the N. N. 

 W. and N. by W. till noon, when in latitude 15° 30' N., long. 114° 46' 

 E. Bar. 29.30. Ther. 84f p. m. wind W. S. W. moderate, but heavy 

 confused sea. 



10//* September. — Till noon the heavy confused sea continues, lati- 

 tude 17° 51' N., longitude 113° 52' E. Barometer 29.50. Ther. 84. 

 We have now to consider the probable track of this storm. It is 

 clear from its mode of veering, that it was one passing to the North- 

 ward of the fleet, and we may perhaps suppose its centre to have 

 been at one time, from the great depression of the Barometer, not 

 more than 40 or 50 miles distant. Its track is next to be consi- 

 dered. 



We have not the Thebaris log for the 7th, but as towards evening, 

 say 6 p. m. of that day, the Indiamen had all sent down top-gallant 

 yards, and struck the masts, we may fairly take the gale to have 

 began by this time from N. N. W., and we find very clearly from 

 Captain Hamilton's remark in the Bombay's log, which I have just 

 quoted, that it was " breaking up" between W. S. W. and S. W., that 

 is about S. W. by W. The drift of the fleet was about E. S. E. or 

 E. by S. Projecting this, it gives about a W. half N. course for the 

 centre of the storm, which I have taken. It could I think be hardly 

 more than W. by N. and certainly was not due West. 



The Glatton was too far to the South, and too nearly on the same 

 meridian, to afford us any assistance in estimating the track of the 

 storm, though it is clear it was of no great extent, since it barely 

 reached her. Her crossing the " confused sea," which the centre of the 

 tyfoon left behind it is curious; and an exact confirmation of what 

 occurred to the London Thetis, in the Golconda's storm of September 

 1840, as will be subsequently noticed.* 



The barometrical observations made on the Wexford, for which 



I am indebted to Mr. Packman's notes, are of much interest. It 



would seem from them, (and they are so fully corroborated by those 



of the other ships which have noted the state of theirs in their logs, 



i 



* See Fourth Memoir on the Law of Storms, Jour. As. Soc. vol. x. p. 905. 



