Meteorological Observations. 



xxxix 



Abstract of the Hesults of the Hourly Meteorological Observations 



taken at the Surveyor GeneraVs Office, Calcutta, 



in the month of October, 1859. 



Monthly Kesults. 



Mean height of the Barometer for the month, 



Max. height of the Barometer occurred at 9 A. M. on the 28th, 



Min. height of the Barometer occurred at 4 P. M. on the 6th, 



"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 

 29.796 

 30.053 

 29.600 



0.453 

 29.858 

 29.741 



0.117 



Mean Dry Bulb Thermometer for the month, 

 Max. Temperature occurred at 2 P. M. on the 1st, 

 Min. Temperature occurred at 5 & 6 a. m. on the 31st, 

 "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, 



81.5 

 89.8 

 71.8 

 18.0 

 87.2 

 77.3 

 9.9 



o 



77.2 



4.3 



75.0 



6.5 



Inches. 



0.854 



Troy grains. 

 Mean Weight of Vapour for the month, .. .. .. 9.18 



Additional Weight of Vapour required for complete saturation, .. 2.13 



Mean degree of humidity for the month, complete saturation being unity, 0.81 



Kained 10 days, Max. fall of rain during 24 hours, 

 Total amount of rain during the month, 

 Prevailing direction of the Wind, 



Indies. 

 1.59 



4.96 



W. & N. & N. W. 



