Meteorological Observations. 



xcv 



Abstract of the Results of the Hourly Meteorological Observations 



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



mouth of December 1806. 



Monthly Results. 



Mean height of the Barometer for the month... 



Max. height of the Barometer occurred at it) a. it. en the 20th 



Min. height of the Barometer occurred at 4 r. M. on the 30th 



Extr 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. 



30.079 

 30.273 

 29.890 



0.383 

 30.151 

 30.019 



0.132 



Mean Dry Bulb Thermometer for the month 

 Max. Temperature occurred at 3 p. m. on the 1st 

 Min. Temperature occurred at 7 a. m. on the 30th 

 Extreme ran fie of the Temperature during the month 

 Mean of the daily Max Temperature ... 



Ditto ditto Min. ditto, 

 Mean daily ran ie of the Temperature during the month. 



o 



67.1 



82.0 

 55.6 

 26.4 

 77.0 

 58.9 

 18.1 



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 



60.7 



6.4 



55.6 



11.5 



Inches. 

 0.452 



Troy grain. 



Mean Weight of Yapour for the month ... ... ... 5.00 



Additional Weight of Vapour required for complete saturation ... 2.32 

 Mean degree of humidity for the month, complete saturation being unity 0.68 



Inches. 



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



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. & N. W. 



