1850.] Nineteenth Memoir on the Law of Storms. 379 



the veering of the wind, was passing her close to the N. Eastward while 

 she was hove to ; the Cyclone leaving her with a strong breeze only, 

 from the Southward, by noon of the 23rd, when she might be about 

 172 miles West from the position of H. M. S. Jumna at that time, 

 which would give about 150 miles for the semi-diameter of the Cyclone 

 taking the Jumna to have been at noon close on the eastern verge of 

 the centre. 



The next ship, and she must have been not far from the Lady Sale, 

 is the Samarang. We find that her Easterly gale had increased to a 

 hurricane from E. b. N. by 8 p. m. of the 22nd; and that at midnight 

 her Barometer had fallen to its lowest, 29.39, with the wind about 

 E. S. E. veering to South at 8 a. m., and moderating with the Barometer 

 at 29.50 by Noon. Hence it is clear that the centre passed her to the 

 Eastward, and if we take the average strength and shift of the wind to 

 have been from E. N. E. when it is described on the 22d as an 

 increasing gale, obliging the ship to be hove to, to South, this would 

 give a S. E. b. E. course for the body of the Cyclone. 



We have then the Sultany to the N. Eastward in about 9° 32' S. ; 

 and about 83° 27' East, or not quite midway from the Pemberton and 

 Deborah, a little more than 100 miles N. E. of the Lady Sale, and 

 not quite 100 miles N. West of the Jumna; and we find that at noon, 

 in about this position, she must have been at the centre since she had 

 " the wind all round the compass with a dreadful sea and thick dense 

 atmosphere, the vessel lying with her lee gunwale in the water."* 



H. M. S. Jumna, to which we now come, has her position also as well 

 ascertained as that of vessels can be in weather of this nature, and so 

 far better than the Sultany' s that the Jumna was going free and the 

 Sultany' s drift only can be estimated. We see that she was at 

 the distance of 98 miles to the S. E. b. East of the Sultany, which 

 would have given her if she had the same Cyclone a N. E. b. N. 

 wind, instead of which we find she had one to the Westward of North 

 that is N. N. W. ! at Noon, or one differing five points. This is not 

 reasonably reconcileable and we may either suppose that H. M. S. 

 Jumna had a smaller Cyclone travelling down with her, in her run on 

 this day, and that it was about the spot where the Sultany* s and 



* The Sultany is one of the finest ships out of the Port of Calcutta, of 1000 

 tons burden, and ably commanded. We see that she was fully prepared for the 

 hurricane, though from its unusual track she was involved in it. 



