Meteorological Observations. 



vu 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General's Oljice, Calcutta, 



in the mouth of January 1873. 



Monthly Results. 



Mean height of the Barometer for the month 

 Max. height of the Barometer occurred at 10 a. m. on the 21st 

 Min. height of the Barometer occurred at 5 p. m. on the Gth 

 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 



Indies. 

 29.962 

 30.160 

 29.80L 



0.359 

 30.038 

 29.903 



0.135 



Mean Dry Bull) Thermometer for the month 

 Max. Temperature occurred at 3 p. m. on the 7th 

 Min. Temperature occurred at 5, 6 & 7 A. M, on the 12th 

 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 



o 



68.0 

 81,(> 

 53.0 

 31.0 

 77.9 

 60.1 

 17.8 



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 



. 61.8 



6.2 



. 56.8 



. 11.2 



Inches. 

 . 0.470 



Troy grain. 

 Mean Weight of Vapour for the month ... ... ... 5.19 



Additional Weight ot Vapour required for complete saturation ... 2.34 

 Mean degree of humidity for the month, complete saturation being unity 0.G9 



Mean Max. Solar radiation Thermometer for the month 



o 



128.8 



Rained No. day, — Max. fall of rain during 24 hours ... 

 Total amount of rain during the month 

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

 meter during the month 

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



Inches. 



Nil 



Nil 



Nil 

 N. W. 



* Height 70 feet 10 inches above ground. 



