Meteorological Observations. 



h 



Abstract of the Results of the Hourly Meteorological Observations 



taken at th6 Surveyor General" s Office, Calcutta, 



in the month of August, 1865. 



Monthly Results. 



Mean height of the Barometer for the month, 

 Max. height of the Barometer occurred at 11 a. M. on the 17th, 

 Min. height of the Barometer occurred at 2 a. m. on the 28th, 

 Extreme range of the Barometer during the month, 

 Mean of the Daiiy Max. Pressures, . .. .. 



Ditto ditto Min. ditto, 

 Mean daily range of the Barometer during the month, 



Inches 

 29 623 

 29.779 

 29.311 



0.468 

 29.685 

 29.553 



0.132 



Mean Dry Bulb Thermometer for the month, . . 

 Max. Temperature occurred at 3 p. M. on the 5th & 26th, 

 Min. Temperature occurred at 7 a. m. on the 2nd, 

 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, 



84.5 

 92.6 

 77.2 

 15.4 

 89.7 

 81.1 

 8.6 



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, .. .. 



81.3 

 3.2 



79.1 



5.4 



Inches 



0.973 



Troy grains 

 Mean Weight of Vapour for the month, .. .. .. 10.42 



Additional Weight of Vapour required for complete saturation, .. 1.93 



Mean degree of humidity for the month, complete saturation being unity, 0.84 



Kained 22 days, Max. fall of rain during 24 hours, 

 Total amount of rain during the month, .. 



Prevailing direction of the Wind, .. .. 



Indies 

 172 

 5.99 

 S. & S. E. 



