458 A Tiventy -fourth Memoir on the Law of Storms. [No. 5, 



Cyclone, which was an undoubted one, to have been the Cyclone which 

 travelled up to the Eastward of the Light vessels and over Bagundee, and 

 this appears to me to be its probable track — we shall be unable to reconcile 

 any centre upon this track, taking also the known rate of travelling which 

 we have assigned above with these ships' positions and winds. 



I have therefore assumed that there were on this day, and for part of 

 the 14th, two Cyclones, the main one being the London's, which certainly 

 was, during the whole of this day, a furious tempest with that ship, passing 

 off at a moderate rate of progression to the Northward ; and the smaller one 

 being that indicated by the winds of the Amazon and Limehouse only ; of 

 which the centre seems to be in Lat. N. 17° 49' Long. 86° 38' and being of 

 so small an extent that it did not reach the position of the Adelaide on this 

 day at noon. And there is nothing new in this assumption for we know, 

 that these in-shore Cyclones hereabouts, while larger and heavier and 

 perfectly formed ones are blowing in the Bay, are quite common. It 

 would seem indeed that as in a former instance (XXIII. Memoir, Journal, 

 Vol. 23rd, p. 505) the minor of the two Cyclones, or in other words the 

 absorption of the small one into the larger, occasioned some disturbance 

 in the regularity of the wind at False Point Light House, for we 

 find that there were not only two distinct scuds S. East and S. W., 

 but that moreover the wind veered from East to North settling to a 

 steady gale at N. W. till noon of Eriday the 14th, when it changed to 

 North, and at 5 veered again to S. East breaking up at 6 p. m. in a S. S. 

 E. and finally a Westerly breeze. 



Eor the main Cyclone on this day we have no other position than its 

 calculated distance on the line of track at eight miles per hour which will 

 place it in Lat. 17° 25' N. Long. 89° 15' East, and we shall see also that 

 this line of track and rate of travelling agrees on the 14th, with the 

 times and direction of the winds experienced by the Floating Light Ves- 

 sel, and Salween, P. V. at the Sand Heads. 



14th May. — If we take for this day on the line of the main or Lon- 

 don's Cyclone, the same rate of travelling as before, viz. six miles per 

 hour, for the twenty- four hours, we shall find that the centre falls on a 

 spot in Lat. 20° 38' N. Long. 89° 03' East or forty-four miles to the S. 

 East of the Floating Light Vessel's station, and that this position with 

 the line of the track which we have assumed, agrees with the rapid veer- 

 ing of the wind after Noon of this day as shewn by the capital Log of 

 the H. C. P. V. Salween. It also agrees with the wind at Calcutta, at 

 Saugor, Balasore, False Point and the Pilot Vessels on the Eidge, but 

 it does not appear to have reached so far as the position of the Adelaide 



