Meteorological Observations. 



lxxix 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor GeneraVs Office, Calcutta, 



in the month of October, 1864. 



Monthly Eesults. 



Mean height of the Barometer for the month, 



Max. height of the Barometer occurred at 9 a. m. on the 29th, 



Min. height of the Barometer occurred at 2 p. M. on the 5th, 



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 

 29.866 

 30.062 

 28.681 



1.381 

 29.935 

 29.780 



0.155 



Mean Dry Bulb Thermometer for the month, . . 

 Max. Temperature occurred at 2 p. m. on the 3rd, 

 Min. Temperature occurred at 6 a. m. on the 21st, 

 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, 



80.3 

 90.8 

 69.1 

 21.7 

 85.8 

 75.6 

 10.2 



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, 



75.0 



5.3 



71.3 



9.0 



Inches 

 0.758 



Troy grains 

 Mean Weight of Yapour for the month, -• .. % . 8.18 



Additional Weight of Yapour required for complete saturation, . . 2.73 



Mean degree of humidity for the month, complete saturation being unity, 0.75 



Eained 9 days, Max. fall of rain during 24 hours, 

 Total amount of rain during the month, 

 Prevailing direction of the Wind, .. ., 



Inches 



1.59 



.. *6.50 



N. & E. 



