

1854.] A Tiventy-tliird Memoir on the Law of Storms. 545 



From this station, the track to the N. East carries us into the 

 wilds of the Sunderbunds, whence no reports can be obtained, and 

 we cannot consider the Noacolly and Chittagong Cyclone to be any 

 part of this at Kedgeree, as its track, was evidently from South to 

 North, and it commenced within 12 hours of the passage of the 

 centre at Mud Point. The veering of the wind with H. M. S. Fox 

 at Diamond Harbour, I need not remark, is exactly that of a Cyclone 

 passing up on a N. E. track to the South-East and East of the 

 Vessel, her Barometer being lowest (29.375) with the wind North, 

 shewing that the centre was nearest to her when bearing East. 



Rate of Travelling. — We have, from the foregoing documents, 

 a tolerably exact knowledge of the time which the Cyclone centre 

 took to travel from a position a few miles West (inland) from the 

 Light House on Ealse Point ; on perhaps a somewhat eurving track 

 up to Kedgeree, which was from 8 a. m. on the 22nd to 5h. 20' a. m. 

 on the 23rd, or 21h. 20' of time. Now the distance on a straight line 

 between these points is 115 miles* which gives a rate of 5.4 (five 

 miles, four-tenths) per hour for that of the Cyclone's travelling on 

 this part of its course ; and we find moreover that passing Kedgeree 

 at 5h. 20' a. M. it moderated for a short interval at 7 a. m. with 

 Mr. Bedford at Mud Point, and at 8, there was a sudden shift when 

 it blew as hard as ever ; so that taking the centre to have passed 

 thus at 7h. 30 ; a. m. this gives about an interval of two hours for it 

 to traverse from Kedgeree Light House to Mud Point, a distance of 

 11 miles or 5.5 miles per hour, the former rate being 5.4. 



We have thus very fairly the rate of travelling for the 22nd, — 23rd, 

 and if we were to assume that on the 21st, 22nd, it was travelling 

 at the same rate, we should only have to measure back 132 miles to 

 find the place of the centre of the Ararat's Cyclone for the 21st ; but 

 this distance so measured would only place the centre far enough to 

 the South, to give the Ararat a S. W. wind, whereas we see by her log 

 she had it still at about South or at most S. b. W. so that our former 

 estimation of the place of the centre as being at about 175 miles South 

 of Ealse Point is probably the correct one. This distance would give 



* 113 miles from Light House to Light House, but 2 miles more are allowed for 

 the centre being to the Westward of Kedgeree. 



4 o 



