1845.] Eleventh Memoir on the Law of Storms in India. 53 



wind at from between South to S. S. W. and S. W. those which had 

 it steadiest and were furthest to the Eastward, i. e. nearest to the centre, 

 which are the Ainslie and Ugie, having it between South and S. S. W. 

 so that we may call it almost S. b. W. on the average, which would give 

 the centre bearing at noon E. b S., from the centre of the triangle formed 

 by them, at any distance we may suppose ; but it is barely possible to 

 assign this, as we know nothing of the general sizes of the vortices in 

 the Southern hemisphere or of this one in particular. We may notice 

 also that to this day the two ships Edmonstone and Sophia which 

 were, though in about the same Lat. three or four degrees to the West 

 of the others, had nothing but variable light breezes, and fine weather. 

 On the 26th November. — We have still the same four ships near 

 each other, though somewhat more dispersed ; two, the Futtle Rozack 

 and Ainslie, being at 73 miles from each other and the other two 

 about midway between them, the whole four had severe gales and 

 by noon, the Fleming was lying to under storm stay sails ; the Ugie 

 under bare poles at 4 p. m. and the Ainslie also hove to at noon. 

 These three ships had the wind between W. S. W.and S. W. The Fut- 

 tle Rozack, the northernmost ship, having it about S. W. at noon, though 

 as she was running away to the S. E. b. E. she found it drawing more 

 Westerly. Taking a spot in the middle of the acute rhomboid formed 

 by their four positions,* which will only differ 35 miles at farthest 

 from the two most distant from each other, and this in the line of 

 the perpendicular, we shall find it to be in Lat. 6° 5' S. Long. 86° 

 30' E. and if we take it that here the average wind was really S. W. b. 

 W. | W. we shall have the centre bearing from us S. E. b S. J S. and 

 we may perhaps assume that the distance of it did not exceed from 

 this spot 150 miles, which would place it as I have marked it in Lat. 

 8° 17' S., Long. 87° 45' E. It was not much more than this distance, 

 for the Sophia and Edmonstone which were about 220 miles due 

 West of these four ships, had still fine weather with a brisk S. S. W. 

 and Southerly breeze at noon in this day and the Baboo, as nearly as we 



* This, when the positions of vessels do not afford cross bearings by the perpendi- 

 culars from their tangents is far the safest and must be the most correct method, par- 

 ticularly if we take into account how ill the exact positions can be ascertained in 

 such weather and with how little exactitude the direction of the wind also is noted 

 iu most logs. 



