Meteorological Observations. 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General 1 s Office, Calcutta, 



in the month of February, 1865. 



Monthly Eestjlts. 



Incliea 



Mean height of the Barometer for the month, .. .. .. 29.972 



Max. height of the Barometer occurred at 10 & 11 a. m. on the 15th & 28th, 30.157 



Min. height of the Barometer occurred at 6 p. m. on the 10th, .. 29.802 



Extreme range of the Barometer during the month, .. ,. 0.355 



Mean of the Daily Max. Pressures, . . .. .. .. 30.062 



Ditto ditto Min. ditto, .. .. .. .. 29.907 



Mean daily range of the Barometer during the month, ., .. 0.155 



Mean Dry Bulb Thermometer for the month, . . 

 Max. Temperature occurred at 3 p. M. on the 20th, 

 Min. Temperature occurred at 7 a. m. on the 7th, 

 Extreme range of the Temperature during the month, 

 Mean of the daily Max. Temperature, 

 Ditto ditto Min. ditto, .. 

 Mean daily range of the Temperature during the month, 



o 

 73.7 

 87.8 

 61.2 

 26.6 

 82.1 

 66.5 

 15.6 



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, .. 



66.5 



7.2 



61.5 



12.2 



Inches 



0.550 



Troy grains 

 Mean Weight of Vapour for the month, .. .. .. 6.01 



Additional Weight of Vapour required for complete saturation, . . 2.95 



Mean degree of humidity for the month, complete saturation being unity, 0.67 



Rained 10 days, Max. fall of rain during 24 hours, 

 Total amount of rain during the month, ,. 



Prevailing direction of the Wind, ,. .. 



Inches 

 0.72 

 1.86 

 N. W. & W. 



