xl Meteorological Observations. 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General's Office, Calcutta, 



in the month of May, 1857. 



On the 23rd May, 1857, the Meteorological Observations after 

 ten minutes intervals being taken at the {Surveyor General's Office, 

 they indicate the following circumstances : — 



h. m. h. m. 



Exact Time of Minimum Barometer, 2 20 A. M. and 5 P. M. 



Ditto Maximum Barometer, 9 30 do. and 10 30 do. 



f Between 5 and 6 A. M. 



j during the whole of which 



t^.,, , r . . t, , interval the Thermometer 



Ditto Minimum Temperature, <j stood at ^ game reading 



| 80.4 which was the lowest 

 ^ temperature during the day. 



Ditto Maximum Temperature, 2 20 p.m. 



On the 7th, a Southerly breeze blew from 10 A. M. till 4 p. m. ; 

 after which a South Easterly breeze springing up ; the sky became 

 overcast and distant flashes of sheet -lightning were constantly 

 visible on the East side. Things continued in this state till 10 p. m. 

 when it commenced raining heavily. At 20 minutes past 10 p. M. 

 the South Easterly breeze which had been blowing since 4 p. m. 

 became a gale. After the gale had set in, it continually veered its 

 directions. At 11 p. M. all was quiet again. During the prevalance 

 of the gale there was much rain, thunder, and lightning and an 

 incessant fall of hailstones. 



Also the undermentioned gales occurred during the month. 



M ay 20th, between 6 and 7 a.m. a 1ST. E. gale blew for about 

 10 minutes ; only one side of the gale passing over Calcutta, the 

 whole body of the gale going by the East thereof. 



May 20th, between 7 and 8 p. m. a S. W. gale blew for about 

 three quarters of an hour ; during which and for upwards of an 

 hour afterwards, there was much lightning and thundering, accom- 

 panied with little rain. 



May 28th, between 5 and 6 p.m. a N. W. gale blew for about 

 20 minutes. 



May 30th, between 6 and 7 p. m. a W. gale blew for about 

 20 minutes, during which there was little rain. 



