lxxvi M( teorological Observations. 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General's Ojjice, Calcutta, 

 in the mouth of September 1873. 



Monthly Results. 



Indies. 



Mean height of the Barometer for the month ... ... ... 29.668 



Max. height of the Barometer occurred at 9 a. m. oh the 17th ... 29.872 



Miu. height of the Barometer occurred at 3 p. m. on the 4th ... 29.429 



Extreme range of the Barometer during the month ... ... 0.443 



Mean of the daily Max. Pressures ... ... ... ... 29.726 



Ditto ditto Min. ditto ... ... ... ... 29.605 



Mean daily raiuje of the Barometer during the mouth ... ... 0.121 



o 



Mean Dry Bulh Thermometer for the month ... ... ... 84.3 



Max. Temperature occurred at 2 y. M. ou the 29th... ... 93.6 



Min. Temperature occurred at 6 p. M. on the 6th ... ... ... 76.5 



Extreme range of the Temperature during the month ... ... 17.1 



Mean of the daily Max. Temperature ... ... ... ... 89.7 



Ditto ditto Min. ditto, ... ... ... ... 80.7 



Mean daily range of the Temperature during the month ... ... 9.0 



Mean Wet Bulh Thermometer for the month ... ... ... 80.9 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer 3.4 



Computed Mean Dew-point for the month ... ... ... 78.5 



Mean Dry Bulb Thermometer above computed mean Dew-point ... 5.8 



Inches. 

 Mean Elastic force of Vapour for the month ... ... ... 0.955 



Troy grain. 

 Mean Weight of Vapour for the month ... ... ... 10.23 



Additional Weight of Vapour required for complete saturation ... 2.05 

 Mean degree of humidity for the month, complete saturation being unity 0.83 



o 



Mean Max. Solar radiation Thermometer for the month ... ... 137.3 



Indies. 

 Rained 21 days, — Max. fall of rain during 24 hours ... ... 2.32 



Total amount of rain during the month ... ... ... 5.82 



Total amount of rain indicated by the Gauge* attached to the anemo- 

 meter during the month ... ... ... ... ••• 5.44-. 



Prevailing direction of the Wind ... ... S. S. W & S. W. 



* Height 70 feet 10 inches above ground. 



