1884.] 



of the Bay of Bengal in 1883. 



93 



The various observations enable the centre of the barometric de- 

 pression to be determined very approximately at 10 A. M. and at noon of 

 the 29th. The wind directions at 10 A. m. observed on board the Light 

 Vessels at the Upper Grasper and Intermediate stations were south-east 

 and west, and hence the centre was between these vessels. Its position 

 as determined by charting the wind directions and barometric heights 

 was Lat. 21° 30' N. and Long. 87° 55' E. 



The following table gives the chief observations taken at the light 

 vessels and neighbouring land stations at 10 A. M., and the distance and 

 bearing of the centre from each of them. 





Position. 



© 



a 



o 



pq 



Winds. 



o 



o 



g 



ll 



from 

 posi- 

 ntre. 





Latitude. 



N. 



Longi- 



tudo. 

 E. 



o 



1 





Distance 

 probable 

 tion of ce 



Saugor Island Light 

 House. 



Upper Gasper Light 

 Vessel. 



Intermediate Light 

 Vessel. 



Eastern Channel 

 Light Vessel. 



Balasore 



False Point .. . 



21° 39' 

 21° 31' 

 21° 15' 

 21° 1' 



21° 30' 



20° 20' 



88° 5' 



88° 3' 



88° 11' 



88° 12' 



86° 58' 

 86° 47' 



29-146 



29-140 



29164 



29-199 



29-296 

 29-419 



E. 



S. E. 

 W. 



w. s. w. 



N. N.W, 



VV. s. w. 



Mode- 

 rate. 



5 



6 



8 to 9 



8 

 Strong 



S. W. 

 W. 



N. W. 

 N. W. 



E. 



N. E. 



14 



8 



24 



38 



60 

 110 







The nearest light-vessels were between 5 and 25 miles from the 

 centre in the eastern quadrant, and yet experienced very moderate 

 winds of force 5 to 6, whilst the Pemba and Commillah, at much greater 

 distances in the same quadrant, had wdnds of force 9 to 11. 



The unusual weakness of the winds in all quadrants near the centre, 

 as compared with those in the south-eastern quadrant at considerable 

 distances from the centre, is a remarkable fact, and one that is opposed 

 to the general experience of cyclonic motion. 



The noon barometric readings and wind directions of the ships, 

 when charted, indicate that the centre Avas at that hour probably in 

 Lat. 21° 30' N. and Long. 87° 50' E. It had moved about five miles to the 

 west during the previous two hours. 



The following table gives the distance and bearing of tho centre 

 from each of the vessels at that hour : — 

 13 



