Meteorological Observations. 



xcv 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor GeneraVs Office, Calcutta, 



in the month of December, 18G5. 



Monthly Kesttlts. 



Mean height of the Barometer for the month, 



Max. height of the Barometer occurred at 10 a. m. on the 22nd, 



Min. height of the Barometer occurred at 4 p. m. on the 28th, 



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, .. 



Inches 

 30.034 

 30.196 

 29.883 



0.313 

 30.113 

 29.973 



0.140 



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



Max. Temperature occurred at 2 p. M. on the 3rd, .. 

 Min. Temperature occurred at 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, . . 



71.0 



85.6 



56.8 



28.8- 



80 1 



63.4 



16.7 



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 Yapour for the month, .. .. 



64.7 

 6.3 



59 7 



11.3 



Inches 



0.518 



Troy grains 

 Mean Weight of Vapour for the month, .. .. .. 5,69 



Additional Weight of Vapour required for complete saturation, .. 2.56 



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



Bained No days* Max. fall of rain during 24 hours, 

 Total amount of rain during the month, .. 



Prevailing direction of the Wind, ., ,, 



Inches 

 Nil. 



Nil. 

 N. & W. & S. 



