Meteorological Observations. lxxi 



Abstract of tlie Results of the Hourly Meteorological Observations 



taken at the Surveyor GeneraVs Office, Calcutta, 



in the month of February , 1860. 



Monthly Eesults. 



Inches 



Mean height of the Barometer for the rue-nth, .. .. 29.913 



Mas. height of the Barometer occurred at 9 A. M. on the 17th, . . 30.095 



Min. height of the Barometer occurred at 5 p. M. on the 29th, .. 29.688 



Extreme range of the Barometer during the month, . . . . 0.407 



Mean of the daily Max. Pressures, . . . . . . 29.994 



Ditto ditto Min. ditto, .. .. .. 29.846 



Mean daily range of the Barometer during the month, .. .. 0.148 



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 22nd, 

 Extreme range of the Temperature during the month, . . 

 Mean of the daily Max. Temperatures, 



Ditto ditto Min. ditto, 

 Mean daily range of the Temperature during the month, 



o 



75.8 



93.4 



63.6 



29.8 



85.7 



67.9 



17.6 



o 

 Mean Wet Bulb Thermometer for the month, . . . . 68.4 



Mean Dry Bulb Thermometer above Mean "Wet Bulb Thermometer, . . 7.4 



Computed Mean Dew-point for the month, .. .. .. 64.7 



Mean Dry Bulb Thermometer above computed Mean Dew-point, . . 11.1 



Inches 

 Mean Elastic force of Vapour for the month, . . . . 0.611 



Troy grains 

 Mean Weight of Yapour for the month, '.. .. .. 6.65 



Additional Weight of Vapour required for complete saturation, . . 2.89 



Mean degree of humidity for the month, complete saturation being unity, 0.70 



Inches 

 Eained 2 days, Max. fall of rain during 24 hours, .. . . 0.09 



Total amount of rain during the month, . . . . . . 0.09 



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



