1842.] A Seventh Memoir on the Law of Storms in India. 1085 



By reports the wind was, 

 At The wind should be by estimate about 



Mud Point, E.N.E. 9 miles 



from Kedgeree, N. W. by W N. W. 



At sea, to the S. E. of the 



Light Vessel (Log of the 



Coleroon,) S. W S. W. 



Balasore, N. W. by N N. W. 



Burrisal, S. by E about S. S. E.* 



Kissennagur, East N. E. to East. 



I have not included here such places as Berhampore, &c, because 

 they are on the verge of the circle or out of it, and at Bancoorah we 

 have the anomaly of the wind at W. N. W., with that already noticed 

 in the Midnapore vortex. It will be seen that the rest of the tangents 

 agree well enought to form a circle of, say 180 miles in diameter. 



Towards the stations situated not far from the first rising of the 

 spurs of the Sub-Himalaya, as Dinagepore and Poornea, we find that 

 on this day the gale commenced at the most Easterly of these two, 

 Dinagepore, which is about on the meridian of Calcutta, but 153 miles 

 to the North of it, at 10 p. m.; but at Titalayah which is really on the 

 ascent, and 81 miles further North, nothing was felt on this day, or on 

 the succeeding. 



We have now to consider the course of the storm from noon of the 

 3rd to noon of the 4th. We find that by noon of the 4th, it had 

 quitted Calcutta entirely, and that it was 



At Chandernagore, Variable N. N. E. to S. W. 



„ Chinsurah, Abating. 



Both these places being then towards the verge of our supposed 

 circle, and in its retreating S. E. quarter. 



* The report says, " E. S. E. at 2-30 a. m. veering to South, and moderating in the 

 evening. Now this may be called veering 6 points in 16 hours, and as from 2-30 a. m. 

 to noon there are 9* hours, this would give 3* points of veering to noon, or from E. S. 

 E. to S. S. E.|E- We do not know that it did veer at equal rates, in equal times, 

 and probably did not." 



f lsay here, "well enough" adverting to the difficulties which, as I have pointed out 

 in former memoirs, always exist in determining what was the true direction of the 

 wind ; how that direction was influenced at the surface of the earth by local causes ; 

 and finally, the great probability that the wind at the circumference is often not a tan- 

 gent, but a spiral curve. This I have endeavoured to shew on the diagrams and in 

 the title, and Midnapore circles. — See also Col. Reids and Mr. Redrield's works. 



