Meteorological Observations. 



xv 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General's Office, Calcutta, 



in the mouth oj February 1873. 



Monthly Results. 



Moan height of the Barometer for the month 

 Max. height of the Barometer occurred at 10 a. m. oh the 3rd 

 Min. height of the Barometer occurred at 4 & 5 P. M. on the 2ith 

 JSirtreme 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. 

 . 29.935 

 . 30.194 



29.686 

 , 0.508 

 , 30.016 

 . 29.872 

 . 0.141 



Mean Dry Bulb Thermometer for the month 

 Max. Temperature occurred at 3 r. m. on the 27th 

 Min. Temperature occurred at 7 a. m, on the 25th 

 Extreme range of the Temperature during the mouth 

 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 



o 

 73.9 

 93.5 

 57.9 

 35.6 

 85.1 

 61,6 

 20.5 



. 65.7 



8.2 



60.0 



. 13.9 



Inches. 

 . 0.523 



Troy grain. 

 Mean "Weight of Vapour for the month ... ... ... 5.71 



Additional Weight of Vapour required for complete saturation ... 3.30 

 Mean degree of humidity for the month, complete saturation being unity 0.6-i 



Mean Max. Solar radiation Thermometer for the month 



o 

 13S.4 



Indies. 

 Rained No. day, — Max. fall of rain during 21 hours ... ... Nil 



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



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

 meter during the month ... ... ,,, ,,, ... ]Vj"j2 



Prevailing direction of the Wind ... ,., N. W. & 3S". E. 



* Height 70 feet 10 inches above ground. 



