804 Ninth Memoir on the Law of Storms in India. [No. 141. 



storms may have been generated 24 hours or more after she had 

 crossed those parts of the Bay where our first circles are struck, and I 

 have thus left the large one, which depends on the calculations 

 derived from the Eliza's log, that the reader may weigh the probabili- 

 ties between the two suppositions, which are, the one that between the 

 29th and 2nd of October, or during three days, the storm was forming 

 and slowly moving on ; and the other, that it formed and moved up as 

 far between noon of the 1st and noon of the 2nd, as between noon of 

 the 2nd and the time of the shift at Pooree, or at a rate approaching 

 to such a velocity ; which would then be the last supposed case of the 

 storms having really crossed this spot twenty-four or more hours after 

 the Tenasserim had done so. 



We now return to the consideration of the Northernmost of the 

 two tracks which I have laid down, or that of the Emerald Isle and 

 Halifax Packet's storm. 



The Halifax Packet was by her log at noon on the 30th in lat. 

 21° 18' long. 88° 40' which I have marked ; but there is no datum of 

 any sort to show where she was at noon on the 1st, and I have thus 

 laid down her place on the 2d only, when the hurricane having dis- 

 masted her had passed on, leaving the wind at South with her at 

 noon. 



The wind is not marked during the ten hours from midnight ; viz. 

 from 2 a. m., when the Barometer had fallen to 27-90, to noon ; but as 

 it was veering from N. N. E. to a gale at East on the preceding day, 

 we may take it to have been in its highest fury, veering from E. S. E. 

 to S. E., and eventually to South, as it passed on; which agrees, as 

 will be seen with her track, as her position between 2 a. m. and noon 

 should lie a little to the S. E. of where it is at noon, as she must 

 have been drifting to the N. West, both with the wind and with the 

 storm wave. 



The Emerald Isle's log describes a very rapidly approaching storm, 

 of which, says Capt. Scales, " the squalls rose in the S. E. quarter, but 

 struck us about East." This is an exact description of a circular storm 

 travelling upon a track to pass to the Southward of the vessel, and 

 perhaps, if we may use the expression, " throwing off" squalls from its 

 periphery. By 5 a. m. on the 2d, the wind was about E. S. E., 

 " increasing with fearful rapidity, blowing heaviest from S. E." which 



