Meteorological Observations. 



xxui 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor GeneraVs Office, Calcutta, 



in the month of March, 1859. 



Monthly Eesults. 



Inches. 

 Mean height of the Barometer for the month, .. .. 29.878 



Max. height of the Barometer occurred at 9 A. M. on the 31st, . . 30.077 



Min. height of the Barometer occurred at 3 A. M. and 7 P. M. on the 14th, 29.719 

 Extreme range of the Barometer during the month, .. .. 0.358 



Mean of the daily Max. Pressures, . . . . . . 29.955 



Ditto ditto Min. ditto, .. .. .. 29.816 



Mean daily range of the Barometer during the month, . . . . 0.139 



Mean Dry Bulb Thermometer for the month, 

 Max. Temperature occurred at 3 p. m. on the 31st, 

 Min. Temperature occurred at 11 p. m. on the 4th, 

 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 



78.7 

 93.3 

 63.4 

 29.9 

 87.2 

 72.6 

 14.6 



o 



72.1 

 6.6 



68.8 



9.9 



Inches 



0.699 



Troy grains. 

 Mean Weight of Vapour for the month, .. .. .. 7.56 



Additional Weight of Vapour required for complete saturation, . . 2.85 



Mean degree of humidity for the month, complete saturation being unity, 0.73 



Rained 6 days, Max. fall of rain during 24 hours. 

 Total amount of rain during the month, 

 Prevailing direction of the Wind, 



Inches. 



1.80 



4.23 



S. & S. W. & W. 



