1842.] A Sixth Memoir on the Law of Storms in India. 625 



Eastward, and the wind North increasing to hard gale at N. N. E. 

 at midnight, when she cut and stood to sea. 



With every allowance for the effect of the high land on the 

 vortex, we cannot I think suppose this storm to be the same, which 

 was also at noon on the 22d blowing with such fury from S. W. by 

 W., as to dismast the Coutts, &c. a few hours later ; for the centre 

 of the southern storm by 3 p. m. must have been bearing S. by E., 

 at most, if not South from the Grand Ladrone, which, if the storms 

 were the same, would make the wind East then ; and it was not even 

 E. N. E. with the Alfred and Boyal George, till about 3 a. m. 

 on the 23d, or 15 hours later! I think this a convincing proof that 

 there were two storms, and have therefore laid down two Tracks 

 for them, taking the northern storm to have travelled from the N. 

 62° E. to the S. 62° W. at about 60 or 70 miles distance from the 

 coast, which will be found to agree well with the logs of the ships, 

 though there may be some discrepancy with that of the War ley, 

 but, first, we can only guess at the wind, from her coming up and 

 falling off, next she was nearly or quite unmanageable, and lastly 

 she was half embayed in the gulf between the N. E. point of Hainan 

 and the coast of China, where the storm must have felt the effect of 

 the high land on both sides. 



The rate of travelling of these two storms is next to be considered. 

 We can hardly assign any fixed centre for the Southern storm on the 

 20th, though we know the direction in which it lay, those of the 2 1st, 

 22nd, and 23rd, however, are sufficiently ascertained, I think, for us 

 to suppose that the storm may have travelled about 150 miles between 

 the 21st and 22nd, and about 180 miles between the 22nd and 23rd. 

 We may allow a mean rate of about seven miles per hour, or 168 miles 

 in the 24 hours, for these two days. 



For the Northern storm we can scarcely assign any rate, for the 

 distance of the centre on the 22nd is quite uncertain, as it is also on the 

 24th, so that we have no data for it. Taking about the same rate, as 

 that of the Southern storm, or 168 miles per day, it will however, be 

 seen, that this is not an improbable one for it. 



I trust that those who may have followed me in this, perhaps 

 somewhat prolix, detail, will remember, that I have given it for the 

 purpose of showing how I have taken the evidence before us; for 



