38 



C. Little— On two remarkable ram-bursts in Bengal, [No. 2, 



night of the 30fch, they had experienced very severe thunderstorms, with 

 most vivid lightning. Though these are only stray facts, they indicate 

 very clearly how the disturbance was advancing. 

 .'- - ' Table. 



Place. 



Hour and date of local storm. 



Bampur Hat ... 

 Calcutta 

 Saugor Island 

 Orissa ... 



3-30 P.M., June 29th. 

 6-0 a.m. to 8 a.m., June 30th. 

 About 10 a.m., June 30th. 

 About midnight, June 30th. 



The following Table gives the hourly changes of pressure from the 

 barograph at Alipore Observatory, on June 30th. Hourly pressure at 

 Alipore corrected for instrumental errors and reduced to 32° Fah. 



June 30th. 



Actual pressure. 



Approximate 

 normal. 



Change. 



4 A.m. 



5 ,, 



6 „ 



7 „ 



8 )? 



9 » 



10 „ 



11 » 



12 „ 



29'539" 



29-54S" 



- -009" 



•563 



•549 



+ •014 



•588 



•560 



+ "028 



•633 



'576 



+ •057 



•597 



•592 



+ -005 



•646 



•602 



+ •044 



•658 



•613 



+ ■045 



•697 



•598 



+ •001 



•678 



•585 



1 



-•007 



The Table shows that at 4 a.m. pressure was normal, that consider- 

 able oscillations occurred between that hour and 11 a.m. (a rise followed 

 by a fall) and that at noon the difference from the normal was the same 

 as it had been at 4 a.m. The general appearance of the part of the trace 

 from which the above measurements were taken is irregular aud jagged 

 without any marked sign of a depression, that is, the trace is of the 

 kind characteristic of the passage of nor'westers in the hot season. 



The temperature changes show a steady decline from 4 a.m. until 

 noon. The change, though not quite regular, is not of the sudden cha- 



