Meteorological Observations, lxxix 



Abstract of the Results of the Hourly Meteorological Observations 

 taken at the Surveyor GeneraVs Office, Calcutta, 

 in the month of October, 1858. 

 Monthly Eesults, 



Inches. 



Mean height of the Barometer for the month, .. . . 29.829 



Max. height of the Barometer occurred at 10 A. M. on the 30th, . . 30.049 



Min. height of the Barometer occurred at 3 a. m. on the 26th, . . 29.291 



Extreme range of the Barometer during the month, . . . . 0.758 



Mean of the daily Max. Pressures, . . . . . . 29.907 



Ditto ditto Min. ditto, .. .. .. 29.754 



Mean daily range of the Barometer during the month . . . . 0.153 



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Mean Dry Bulb Thermometer for the month, . . . . 81.3 



Max. Temperature occurred at 2.3 and 4 p. m. on the 8th, 9th, and 11th, 90.6 



Min. Temperature occurred at 6 A. m. on the 19th, . . 69.2 



Extreme range of the Temperature during the month, .. .. 21.4 



Mean of the daily Max. Temperature, .. .. .. 87.6 



Ditto ditto Min. ditto, .. .. .. 76.2 



Mean daily range of the Temperatures during the month, .. 11.4 



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 Mean Wet Bulb Thermometer for the month, . . .. 75.9 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, . . 5.4 



Computed Mean Dew-point for the month, .. . . .. 73.2 



Mean Dry Bulb Thermometer above computed mean Dew-point, , . 8.1 



Inches. 

 Mean Elastic force of Yapour for the month, . . . . 0.806 



Troy grains. 

 Mean Weight of Yapour for the month, . . . . . . 8.68 



Additional Weight of Yapour required for complete saturation, .. 2.56 



Mean degree of humidity for the month, complete saturation being unity, 0.77 



Inches. 

 Rained 6 days, Max. fall of rain during 24 hours, . . . . 0.10 



Total amount of rain during the month, .. .. .. 8.03 



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



