Meteorological Observations. 



vn 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General's Office, Calcutta, in the 



month of January 1867. 



Monthly Results. 



Inches. 



Mean Lei glit of tlie Barometer for tlie month... ... ... 30.048 



Max. height of the Barometer occurred at 9 a.m. on the 11th . . . 30.248 



Min. height of the Barometer occurred at 4 p. m. on the 23rd ... 29.886 



Extreme range of the Barometer during the month ... ... 0.362 



Mean of the daily Max. Pressures ... ... ... ... 30.125 



Ditto ditto Min. ditto ... ... ... ... 29.989 



Mean daily range of the Barometer during the month ... ... 0.136 



Mean Dry Bulb Thermometer for the month 

 Max. Temperature occurred at 3 p. m. on the 1st 22nd & 25th 

 Min. Temperature occurred at 7 a. m. on the 28th 

 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... 



69.0 



83.2 

 55.2 



28.0 

 78.4 

 61.4 

 17.0 



Mean Wet Bulb Thermometer for the month ... 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer 



Computed M ean Dew-point for the month 



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



Mean Elastic force of Vapour fo r the month .. 



63.1 

 5.9 



58.4 

 . 10.6 



Inches. 

 . 0.496 



Troy grain. 



Mean Weight of Vapour for the month ... ... ... 5.46 



Additional Weight of Vapour required for complete saturation ... 2.30 

 Mean degree of humidity for the month, complete saturation being unity 0.70 



Inches. 



Pained 4 days, — Max. fall of rain during 24 hours ... ... 0.48 



Total amoimt of rain during the month ... ... ... 0.55 



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

 meter during the month ... ... ... ... ... 0.53 



Prevailing direction of the Wind JSf . W. & N. by W. 



