Meteorological Observations. 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General 's Office, Calcutta, 



in the month of September, 1862. 



Monthly Besults. 



Indies 



Mean height, of the Barometer for the month, . . . . 29 704 



Max. height of the Barometer occurred at 10 A. M. on the 22nd, . . 29.880 



Min. height of the Barometer occurred at 4 p. M. on the 25th, .. 29.491 



"Extreme range of the Barometer during the month, .. .. 0.389 



Mean of the daily Max. Pressures, . . . . . . 29.766 



Ditto ditto Min. ditto, .. .. .. 29.638 



Mean daily range of the Barometer during the month, . . . . 0.128 



o 



Mean Dry Bulb Thermometer for the month, . . . . 82.8 



Max. Temperature occurred at 3 P. M. on the 23rd, .. .. 92.2 



Min. Temperature occurred at 6 A. M. on the 19th, .. .. 76.2 



'Extreme range of the Temperature during the month, . . . . 16.0 



Mean of the daily Max. Temperature, .. .. .. 88.0 



Ditto ditto Min. ditto, .. .. .. 79,9 



Mean daily range of the Temperature during the month, .. 8.1 



Mean Wet Bulb Thermometer for the month, . . . . 79,6 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, . . 3.2 



Computed Mean Dew-point for the month, .. .. 78.0 



Mean Dry Bulb Thermometer above computed Mean Dew-point, .. 4.8 



Inches 

 Mean Elastic force of Vapour for the month, . . . . . . 0.940 



Troy grains 

 Mean Weight of Vapour for the month, . . . . . . 10.09 



Additional Weight of Vapour required for complete saturation, . . 1.66 



Mean degree of humidity for the month, complete saturation being unity, 0.86 



Indies 

 Kained 24 days, Max. fall of rain during 24 hours, . . . . 3.24 



Total amount of rain during the month, .. .. .. 10.86 



Prevailing direction of the Wind, .. .. .. S. & S. E. 



