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. 



Mean height of tlio Barometer for the month... 

 Max. height of the Barometer occurred at lo a. m. on the 

 Min. height of the Barometer occurred at 1 p. if. on the 

 Extreme range of tin* Barometer during the month 

 Mean of the daily Max. Pressures 



Ditto ditto " Min. ditto 

 Mean dally range of the Barometer during the month . 





Inches. 





... 30.077 



1st 



... 30.201 



7th 



.. 29.961 





0.240 





... 30.152 





.. 30.020 





... 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 ... ... 2<>.7 



Mean of the daily Max. Temperature... ... ... ... 75.1) 



Dili.) ditto " Min. dido. ... ... 60.9 



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



Mean Wet Bulb Thermometer for the month ... ... ... 01. 7 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer (5.2 



Computed Mean Dew-point for the month ... ... ... 5(5.7 



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 ... ... ... Ts il 



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, 



