lxii 



Meteorological Observations. 



Ábstract of tlie Results of tíie Hourly Meteorological Ohservations 

 taken at tlie Surveyor General* s Office, Calcutta, 

 in the month of January, 1860. 



MONTHLT EESULTS. 



Inclies. 



Mean height of the Barometer for the month, . . . . 30.017 



Max. height of the Barometer occurred at 9 A. M. on the 13th, . . 30.203 



Min. height of the Barometer occurred at 4 p. M. on the 2d, . . 29.878 



"Extreme range of the Barometer during the month, . . . . 0.325 



Mean of the daily Max. Pressures, . . . . . . 30.096 



Ditto ditto Min. ditto, .. .. .. 29.958 



Mean daily range of the Barometers during the month, . . . . 0.138 



Mean Dry Bulb Thermometer for the month, 

 Max. Temperature occurred at 3 p. m. on the 31st, 

 Min. Temperature occurred at 7 A. m. on the 12th, 

 Extreme range of the Temperature during the month, . , 

 Mean of the daily Max. Temperature3, 



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 De w-point for the month, .. 



Mean Dry Bulb Thermometer above computed Mean Dew-point, 



Mean Elastic forcé of Yapour for the month, 



o 



66.3 

 81.4 

 52.7 

 31.7 

 77.5 

 57.6 

 19.9 



o 



60.2 



6.1 



56.5 



9.8 



Inches. 



0.465 



Troy grains. 

 Mean Weight of Yapour for the month, . . . . . . 5.15 



Additional Weight of Yapour required for complete Baturation, . . 2.0o 



Mean degree of humidity for the month, complete saturation being unity, 0.72 



Kained 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, 



