Meteorological Observations. 



xv 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor GeneraVs Office, Calcutta, 



in the month of February, 1859. 



Monthly Eesults. 



Mean height of the Barometer for the month, 



Max. height of the Barometer occurred at 10 A. M. on the 15th, 



Min. height of the Barometer occurred at 6 P. M. on the 28th, 



Extreme range of the Barometer during the month, 



Mean of the daily Max. Pressures, 



Ditto ditto Min. ditto, 

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



Inches. 

 29.980 

 30.146 

 29.823 



0.323 

 30.066 

 29.917 



0.149 



Mean Dry Bulb Thermometer for the month, 

 Max. Temperature occurred at 3 p. m. on the 22nd, 

 Min. Temperature occurred at 7 A. M. on the 16th and 17th, 

 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, 



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 



74.6 

 89.6 

 61.0 

 28.6 

 84.6 

 66.6 

 18.0 



o 



67.6 



7,0 



64.1 



10.5 



Inches. 



0.599 



Troy grains. 

 Mean Weight of Vapour for the month, .. .. .. 6.52 



Additional Weight of Vapour required for complete saturation, . . 2.68 



Mean degree of humidity for the month, complete saturation being unity, 0.71 



Rained 2 days, Max. fall of rain during 24 hours, 

 Total amount of rain during the month, 

 Prevailing direction of the Wind, 



Inches. 



0.66 



0.66 



S. & W. & N. 



