1843.] Ninth Memoir on the Law of Storms in India. 801 



a N. N. W. gale, as the circles of them if extended to her position 

 would require, as shewn by the arrow-line across the track of the Essex. 



Captain McCarthy of the Eliza states, as before said, his gale to have 

 " begun" at midnight from the N. N. E. in latitude about 18° 30' N., 

 longitude 89° 0' E., its centre then must have borne about E. S. E. from 

 him, at what distance we cannot exactly say ; but I have taken it at 

 100 miles by projecting his subsequent drift, (as marked on the chart,) 

 to Noon, when he had the centre of the storm passing him, and the 

 shift of wind to S. S. E., and I have allowed also on the same grounds, 

 that from midnight 1st October to Noon 2nd, the track of the storm 

 was due West. This would place the centre of it at Noon on the 2d 

 in latitude 17° 50' N., longitude 88° 40' E.,as I have marked it; and 

 this position being about on the meridian of the Light Vessels and 

 Pilot station, gives them the Easterly winds and weather which they 

 really had, being on the outskirts of a storm passing their meridian. I 

 have also, it will be seen, marked the supposed place of the centre of 

 this storm at midnight between the 1st and 2nd, and I need not I 

 hope repeat here, that the whole track might have been a curve, or a 

 succession of curves, for any thing we yet know, and that the strait 

 lines are merely used to connect conveniently one point with another, 

 and guide the eye. 



But having thus marked the centre of the Eliza's hurricane at 

 Noon on the 2nd, and we cannot well be far wrong in this, unless as 

 before stated, there is any error in her latitude, we find that in the 

 report from Pooree the Northerly gale which had blown there, increas- 

 ing in strength from the night of the 1st, shifted at 6 p. m. to E. N. E., 

 shewing that a centre of some rotatory storm had passed close to the 

 station, or rather that the station was close to the verge of its calm 

 space if there was one ; since the gale abated in violence for about half 

 an hour, and then blew with renewed strength, veering to the S. E. 

 by 8 p. m., &c. 



Now from the spot where we have marked the centre of the Eliza's 

 hurricane to Pooree is a distance of 208 miles, and as the Eliza had 

 her shift at Noon, and that of Pooree took place at 6 p. m., the interval 

 of time is only 6 hours, during which, if it was the same storm, it must 

 therefore have travelled at the rate of 39 miles an hour. This is a 

 much higher rate than any we have yet found in the Eastern seas, 



