Meteorological Observations. XT 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General" s Office, Calcutta, 



in the month of February, 1864. 



Monthly Eesults. 



Mean height of the Barometer for the month, 

 Max. height of the Barometer occurred at 10 A. M. on the 5th, 

 Min. height of the Barometer occurred at 4 P. m. on the 17th, 

 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 

 29.939 

 30.234 

 29.622 



0.612 

 30.018 

 29.873 



0.145 



Mean Dry Bulb Thermometer for the month, . . 

 Max. Temperature occurred at 3 p. m. on the 13th, 

 Min. Temperature occurred at 6 & 7 A. M. on the 19th, 

 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 mouth, 



Mean Dry Bulb Thermometer above computed Mean Dew-point, 



Mean Elastic force of Vapour for the month, .. 



72.7 

 87.8 

 57.6 

 30.2 

 82.1 

 65.2 

 16.9 



Inches 



65.8 



6.9 



60.3 



12.4 



0.528 



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, 



Troy grains 

 5.79 



Rained 5 days, Max. fall of rain during 24 hours, 

 Total amount of rain during the month, 



Total amount of rain indicated by the gauge attached to the Anemo- 

 meter during the month, . . . . « . 



2.89 

 0.67 



Inches 

 0.38 

 0.47 



0.35 



Prevailing direction of the Wind, .. 



S. & W. 



Hi 



