lxii 



Meteoroloyical Observations. 



Abstract of tlie Results of the Ilourly Meteorological Observations 

 taken at tJw Surveyor General' 's Office, Galcutta, 

 in tlie montli oj December, 1860. 



MONTHLT EESTJLTS. 



Mean heiglit of the Barometer for tlie month, 



Max. lieight of tlie Barometer occurred at 9 A. M. on the 31st, 



Min. heiglit of the Barometer occurred at 4 p. M. on the 7th, 



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 

 30.012 

 30.172 

 29.905 



0.267 

 30.092 

 29.959 



0.133 



Mean Dry Bulb Thermometer for the month, 



Max. Temperature occurred at 2 P. M. on the lst, 



Min. Temperature occurred at 6 A. M. on the 31st, .. • 



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, 

 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 forcé of Vapour for the month, 



Mean Weight of Vapour for the month, 



Additional Weight of Vapour required for complete saturation, 



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



o 



67.2 

 80.4 

 54.0 

 26.4 

 78.0 

 58.9 

 19.1 

 60.8 

 6.4 

 57.0 

 10.2 



Inches 

 0.473 



Troy grains 

 5.23 



2.12 

 0.71 



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. 



