Meteorological Observations. 



XT 



Abstract of the Besults of the Hourly Meteorological Observations 



taken at the Surveyor General's Office, Calcutta, 



in the month of February, 1866. 



Monthly Results. 



Inches 



Mean height of the Barometer for the month, ... ... ... 29.956 



Max. height of the Barometer occurred at 10 a. m. on the 7th, ... 30.138 



Min. height of the Barometer occurred at 5 p. m. on the 28th, ... 29.736 



Extreme Range of the Barometer during the month, ... ... 0.402 



Mean of the daily Max. Pressures, ... ... ... ... 30.034 



Ditto ditto Min. ditto ... ... ... ... 29.894 



Mean daily range of the Barometer dnring the month, ,,, ,., 0.140 



Mean Dry Bulb Thermometer for the month, ... 

 Max. Temperature occurred at 3 p. M. on the 28th, 

 Min. Temperature occurred at 7 a. m. on the 14th, 

 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 



70.3 

 91.4 

 56.2 

 35.2 

 79.2 

 62.9 

 16.3 



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 dbove computed mean Dew-point, 



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



64.0 

 6.3 



59.0 



11.3 



Inches 



0.506 



Troy grains 

 Mean Weight of Vapour for the month, ... ... ... 5.56 



Additional Weight of Vapour required for complete saturation, ... 2.52 



Mean degree of humidity for the month, complete saturation being unity, 0.69 



Rained 5 days, Max. fall of rain during 24 hours, 

 Total amount of rain during the month, 



Total amount of rain indicated by the Gauge attached to the Anemo- 

 meter during: the month, 



Inches 

 1.56 

 3.74 



3.34 



Prevailing direction of the Wind, 



E. & N. & W. 



