1852.] A Twenty-first Memoir on the Law of Storms. 325 



on the 3rd. The diameter of the Cyclone on this day cannot much have 

 exceeded 220 to 250 miles, but its influence was beginning to be felt 

 at 300 miles to the North by the Paragon; at Madras 190' to the N. W. ; 

 and to the N. N. E. by the Hydrabad at about the same distance, and 

 though the Mary Harrison's N. b. W. gale, (for she was hove to under 

 a close reefed main topsail) is an anomaly, I have marked a circle for 

 the Hydrabad and for Madras on this day. 



On the 4th of May. — The centre on this day at Noon is perhaps 

 best determined by the position of the William Fisher, which 

 ship having slipped from Madras Roads on the 3rd, evidently met 

 the centre at 4 p. m. and her reckoning being evidently most 

 carefully kept (though it is not said if with any allowance for the 

 current which sets so heavily along the coast in these gales), her posi- 

 tion is probably nearer the truth than those of the Mary Harrison, 

 Ostrich and Hydrabad, all of which were evidently close on the 

 borders of the centre. Bearing in mind then that the Mary Harrison 

 was probably farther to the S. W. perhaps as far as on the meridian 

 of 81°; and the William Fisher also a little farther to the South, we 

 shall not be far wrong if we estimate the centre to have been about 

 due West of the William Fisher or in Lat. 12° 30' N. ; and in Long. 

 81° 50' East; and that being closely followed up by the monsoon, of 

 which it seems to have been a sort of precursor, the groups of ships to 

 the Southward and S. Eastward of this spot, Fox, Atalanta, Mary Ann, 

 and Hannah had the winds more Southerly than the exact quadrants 

 of the Cyclone would allow them. The Sarah to the Eastward and 

 the Hannah and Diana to the Southward seem both to have had the 

 monsoon, but to the Northward and North Westward the influence of 

 the Cyclone is seen in the Easterly winds of the Catherine Apcar and 

 Paragon and at Cocanada. 



This position of the centre makes the Cyclone to have travelled up 

 on a course of N. 33° ; West 100 miles in the 24 hours, and it agrees 

 very fairly with the probable positions and the winds as stated in the 

 logs of the ships which slipped from Madras Roads, so that it cannot 

 be far wrong. 



On the 5th May, — It would appear that on this day about 3 a. m. 

 the Cyclone passed inland a little to the Northward of Madras, where 

 we find the winds to have veered from N. West at Midnight to 



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