716 Thirteenth Memoir on the Law of Storms in India. [No. 166. 



Summary. 



The following are the considerations from which the track laid down 

 in the Chart No. 1, has been deduced. 



Taking the storm to have originated and come from the Eastward, 

 as we have reason to believe they all do, the most Easterly log we have, 

 which is also the first in point of time, is that of the Ranger, which 

 vessel seems, on the 19th and 20th February, to have passed to the 

 Southward of the storm (or of a storm) in between latitudes 13° and 

 12' S., and on the 21st and 22d February, perhaps to have skirted 

 its Eastern edge in longitude 62° to 64° East. On the 21st we have 

 the Sophia apparently running up and passing close to the NE. border 

 of this storm, having had the weather fine on the 19th, and threatening 

 on the 20th, in latitude 14° 40' longitude 59° 13', with her Barometer 

 at 29.88. The John Adam, in company with her, also with the wind 

 at NW. from 9 p. m. of the 21st and like her standing fast to the 

 NE., and thus out of the storm circle. 



To the South we have the Appolline and Charles Heddle at midnight 

 21st to 22nd 



The Appolline with weather announcing an impending gale in about 

 latitude 16° 20' the wind being at SEbE. and the vessel standing 

 to the NE. while the Charles Heddle had at this time, in latitude about 

 17° 53' longitude 57° 47' the wind so heavy at SE. that she was already 

 scudding. 



The distance however, is so great between the vessels to the North 

 and those to the South, — for taking the Sophia and John Adam as close 

 together, and the mean distance between the Appolline and Charles 

 Heddle' s positions as an opposite point, it will be upwards of six degrees — 

 that we cannot allow them all to have shared in the same storm, parti- 

 cularly as the Appolline, though farther North, had not the winds, it 

 appears, so strong as the Charles Heddle, so that as I take it these were 

 the preliminary streams of wind, to which I have before adverted 

 in former memoirs, which precede as I suppose the formation of a 

 true vortex.* I have thus only marked the different midnight posi- 



* I have more than once said in the course of these Memoirs, that these circular vor- 

 tices must begin somewhere and somehow, and have suggested that they do so by 

 streams of wind. From Mr. Rechendorf, a German gentleman educated as a mining 



