1 849. J Seventeenth Memoir on the Law of Storms, 275 



from thence, and that they ran down to meet it to the S. 40° E. 112 

 miles, till they hove to at 5 \ p. m., and that by the wind and the Ba- 

 rometer the centre was nearest to them at about 3 a. m. on the 3rd. 



Hence, if from the 250 miles of distance we subtract this 122 miles 

 of run there will remain 1 28 miles as the distance made by the Cyclone 

 from midnight to 3 a. m,, or in 27 hours, which will give an average of 

 4.8 miles per hour for its rate of travelling, which though slow is not an 

 improbable one, for the Cyclone lasted nearly two days with both Divi- 

 sions, and both ran across a part of it before heaving to. 



It would seem that there is no sort of doubt that the two Divisions 

 of the fleet experienced the same Cyclone, and as the Cyclone's centre 

 bore from the 2nd division S. 42° East at midnight, and yet though 

 that division made 94 miles of Southing in its run before heaving to it 

 passed close to the Northward of it, we may take its track to have been 

 about from S. 40° East to N. 40° West, and we may certainly mark its 

 course on that track to have been upwards of 500 miles, since we have 

 seen that its diameter alone could not have been much under that 

 extent. 



Track W. 



Third Tyfoon of the H. C. S. Duke of Btjccleugh and Fleet, 8th 



and 9th Juhj, 1797. 



The fleet, as before described, remained separated into two divisions, 

 which were about ?>\ degrees apart, and indeed the second or sternmost 

 division were so scattered that the more distant ships almost formed a 

 third division, but I still continue to distinguish them as the first and 

 second divisions, noting carefully, how the more Northerly ships escaped 

 the Cyclone, of which the centre passed over the first or South East 

 division, and was severely felt by the southernmost ships of the second 

 division. 



The first division were near enough together to allow us to consider 

 them as one fleet, and take the centre of its position as that from which 

 to calculate. This division consisted of the H. C. S. Cvffnells, Duke of 

 Buccleugh, and Taunton Castle ; the Glatton with the Canton in tow 

 (which ship had lost her rudder and was dismasted) having separated 

 from the fleet, and being 2| to 3° to the Northward, did not feel this 

 Cyclone except as a fresh breeze from the S. E. with a long swell from 

 the South, 



