Meteorological Observations. xcv 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General's Office, Calcutta, 



in the month of December 1867. 



Monthly Results. 



Inches. 



Mean height of the Barometer for the month... ... ... 30.077 



Max. height of the Barometer occurred at 10 a. m. on the 1st ... 30.201 



Min. height of the Barometer occurred at 4 p.m. on the 7th ... 29.961 



Extreme range of the Barometer during the month ... ... 0.240 



Mean of the daily Max. Pressures ... ... ... ... 30.152 



Ditto ditto Min. ditto ... ... ... ... 30.020 



Mean daily range of the Barometer during the month ... ... 0.132 



Mean Dry Bulb Thermometer for the month ... ... ... 67.9 



Max. Temperature occurred at 2 p. m. on the 2nd, 4th, 17th & 27th 78.2 



Min. Temperature occurred at 6 & 7 a. m. on the 11th ... ... 57.5 



Extreme range of the Temperature during the month ... ... 20.7 



Mean of the daily Max. Temperature ... ... ... ... 75.9 



Ditto ditto Min. ditto, ... ... 60.9 



Mean daily range of the Temperature during the month... ... 15.0 



Mean Wet Bulb Thermometer for the month ... ... ... 61.7 



Mean Dry Bid!) Thermometer above Mean Wet Bulb Thermometer 6.2 



Computed Mean Dew-point for the month ... ... ... 56.7 



Mean Dry Bulb Thermometer above computed mean Dew-point ... 11.2 



Inches. 

 Mean Elastic force of Vapour for the month ... ... ... 0.469 



Troy grain. 



Mean Weight of Vapour for the month ... ... ... 5.17 



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

 Mean degree of humidity for the month, complete saturation being unity 0.69 



Inches. 



Drizzled 1 day, — Max. fall of rain during 24 hours ... ... Nil 



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



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

 meter during the month ... ... ... ... ... Nil 



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



