Meteorological Observations. xiii 



Abstract of the Results of the Hourly Meteorological Observations 



tahen at the Surveyor GeneraVs Office, Calcutta, 



in the month of November, 1856. 



Monthly Eesults. 



Inches. 

 Mean height of the Barometer for the month, . . . . 29.969 



Max. height of the Barometer occurred at 9 A. M. on the 13th, . . 30.105 



Min. height of the Barometer occurred at 3 p. M. on the 5th, . . 29.841 



Extreme range of the Barometer during the month, . . . . 0.264 



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Mean Dry Bulb Thermometer for the month, . . . . 75.2 



Max. Temperature occurred at 1 P. M. on the 1st, . . . . 87.4 



Min. Temperature occurred at 6 a. m. on the 28th, . . . . 61.9 



Extreme range of the Temperature during the month, . . . . 25.5 



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Mean Wet Bulb Thermometer for the month, . . . . 69.7 



Mean Dry Bulb Thermometer above mean Wet Bulb Thermometer, . . 5.5 



Computed Mean Dew-point for the month, .. .. .. 66.9 



Mean Dry Bulb Thermometer above computed mean Dew-point, . . 8.3 



Inches. 

 Mean Elastic force of Vapour for the month, . . . . 0.657 



Troy grains. 

 Mean Weight of Vapour for the month, . . . . . . 7.16 



Additional Weight of Vapour required for complete saturation, . . 2.21 



Mean degree of humidity for the month, complete saturation being unity, 0.76 



Inches. 

 Slightly Drizzling 2 days, Max. fall of rain during 24 hours, . . Nil. 



Total amount of rain during the month, . . . . . . Nil. 



Prevailing direction of the Wind, . . . . . . N. W. & N. 



From Saturday the 22nd to Tuesday the 25th, it was cloudy day and night : 

 the sun being scarcely once visible, also it was drizzling occasionally which rain 

 was so small that it was not indicated by the Pluviometer. The readings of the 

 Barometer were very steady during the four cloudy days in question. 



