1884.] 



of the Bay of Bengal in 1883. 



149 



The following table gives the observations taken at the recording 

 stations in the neighbourhood of tlie disturbance : — 





Barometer at 10 

 A. M. reduced 

 to sea level. 



Change since 10 

 A, M. previous 

 day. 



Wind direction. 



Velocity in miles 

 por hour since 

 10 A. M. previ- 

 ous day. 



o . 



^ . 



Kainfall at 10 

 A. M. preceding 

 24 hours. 





Stations. 



10 A. M. 



1 



4 p. M. 



Weather. 



Nancowry 



29-836 



— -020 



S. W. 



S. W. 





12 



7 



2-90 



Fine. 



Port Blair 



Diamond Island 



29-760 

 29-848 



— •090 

 — -069 



W. N. W. 

 E. N.E. 



w. s. w. 



E. N. E. 





8 

 12 



9 

 10 



3-90 

 1-12 



Overcast 

 and rain. 



Chittagong . . . 



29-918 



+ -003 



N. E. 



W.N.W. 





1 



3 





Fine. 



Toungoo 



29-860 



— •045 



N. W. 



N. W. 





? 



10 





Gloomy. 



Bassein 



29-861 



— •056 



N. N. E. 



N.N.E. 





5 



10 



1-24 



Overcast. 



Rangoon 



29-913 



— •007 



N.E. 



N. E. 





5 



9 



0-04 



Showery, 



Monlmein 



29-855 



— •016 



N. 



E.S.B. 





2 



8 



0^03 



Fine. 



Mergui 



29-884 



+ -016 



E. S. E. 



E. 





3 



10 



130 



Overcast. 



These observations show that the barometer had fallen considerably 

 at Port Blair, and to a less extent at Nancowry and Diamond Island. 

 The cause of this is also evident from the observations. Heavy rain had 

 fallen at Port Blair and the neighbourhood. Port Blair registered 3"9 

 inches at 10 A. M., Nancowry 2"90 inches, and Diamond Island 1-12 inches. 

 The rainfall on the Burmese coast was smaller than on the previous 

 day. Hence the evidence indicates that the rainfall Avas more concen- 

 trated than hitherto, and was falling mainly over an area near to and 

 including Port Blair. This is confirmed by the fact that cyclonic cir- 

 culation of the air was now fully established. Winds were S. W. at Nan- 

 cowry, E. S. E. at Mergui, E.N. E. at Diamond Island, and W. N. W. at 

 Port Blair. They were increasing in force I'apidly, but were as yet of 

 moderate strength. The wind directions indicate that the centre of the 

 cyclonic circulation was to the east-north-east of Port Blair. It is not 

 possible to infer its position with any appi'oach to exactness from the 

 observations, but we are probably not far from the truth in placing it in 

 Lat. 13^ 30' N. and Long. 94° 15' E. 



As the vessels which have contributed meteorological data were all 

 to the west and north of the Andamans, they only furnish information 

 20 



