Meteorological Observations. 





Abstract of the Results of the Sourly Meteorological Observations 



taken at the Surveyor General's Office, Calcutta, 



in the month of January, 1864. 



Monthly Kestilts. 



Mean height of the Barometer for the month, 

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

 Min. height of the Barometer occurred at 4 p. m. on the 23rd, 

 "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 

 29.992 

 30.177 

 29.828 



0.349 

 30.072 

 29.936 



0.136 



Mean Dry Bulb Thermometer for the month, 

 Max. Temperature occurred at 2 p. M. on the 23rd, 

 Min. Temperature occurred at 7 A. M. on the 25th & 26th, 

 JExtreme 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 force of Vapour for the month, 



o 

 65.0 



82.2 

 52.8 

 29.4 

 75.5 

 56.2 

 19.3 



o 



58.0 

 7.0 



52.4 



12.6 



Inches 



0.405 



Troy grains 

 Mean Weight of Yapour for the month, .. .. ♦. 4.50 



Additional Weight of Yapour required for complete saturation, •> 2.37 



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



Rained xlo 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. & W. 



