IX 



Meteoro logic a I Observat ions . 



Abstract, of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General" s Office, Calcutta, 



in the month of December, 1856. 



Monthly Besults. 



Mean height of the Barometer for the month, 

 Max. height of the Barometer occurred at 10 a. m. on the 22nd, 

 Min. height of the Barometer occurred at 4 p. M. on the 31st, 

 Extreme range of the Barometer during the month, 



Inches. 

 30.025 

 30.172 

 29.906 

 0.266 



Mean Dry Bulb Thermometer for the month, 

 Max. Temperature occurred at 3 p. M. on the 5th, 

 Min. Temperature occurred at 7 A. m. on the 23rd, 

 Extreme range of the Temperature during the month, 



o 



68.5 

 80.8 

 55.8 

 25.0 



Mean Wet Bulb Thermometer for the month, 



Mean Dry Bulb Thermometer above mean Wet Bulb Thermometer, 



Computed Mean Dew-point for the month, 



Mean Dry Bulb Thermometer above computed mean Dew-point, 



Mean Elastic force of Vapour for the month, 



o 



62.8 



5.7 



59.9 



8.6 



Inches. 



0.521 



Troy grains. 

 Mean Weight of Vapour for the month, . . . . . . 5.74 



Additional Weight of Vapour required for complete saturation, . . 1.91 



Mean degree of humidity for the month, complete saturation being unity, 0.75 



Rained No. Max. fall of rain during 24 hours, 

 Total amount of rain during the month, 

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



Inches. 

 Nil. 

 Nil. 



