XCiT 



Meteorological Observations* 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor OeneraVs Office, Calcutta, 



in the month of December, 1864, 



Monthly Eesults. 



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



Max. height of the Barometer occurred at 9 a. m. on the 24th and 26th, 



Min. height of the Barometer occurred at 3 p. m. on the 15th, 



JExtreme 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, .. 



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



Max. Temperature occurred at 3 P. M. on the 19th, .. 

 Min. Temperature occurred at 6 a. m. on the 29th, 



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, . . 



Inches 

 30.036 

 30.191 

 29.898 



0.293 

 30.112 

 29.982 



0.130 



o 



70.3 

 83.0 

 56.2 

 26.8 

 79.3 

 62.9 

 16.4 



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, • • 



634 



6.9 



57.9 



12.4 



Inches 



0.488 



Troy grains 

 Mean Weight of Vapour for the month, .. •• *• 5.36 



Additional Weight of Vapour required for complete saturation, • • 2.72 



Mean degree of humidity for the month, complete saturation being unity, 0.66 



Eained 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. & N. W* 



