xlvi Meteorological Observations. 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor OeneraVs Office, Calcutta, 



in the month of June, 1857. 



Monthly Results, 



Inches. 

 Mean height of the Barometer for the month, .. .. 29.528 



Max. height of the Barometer occurred at 9 A. M. on the 15th, . . 29.707 



Min. height of the Barometer occurred at 4 P. M. on the 22nd, . . 29.249 



Extreme range of the Barometer during the month, . . . . 0.458 



o 

 Mean Dry Bulb Thermometer for the month, . . . . 85.3 



Max. Temperature occurred at 2 & 3 p. m. on the 10th, . . . . 97.2 



Min. Temperature occurred at 6 P. M. on the 27th, . . . . 77.0 



Extreme range of the Temperature during the month, .. .. 20.2 



o 



Mean Wet Bulb Thermometer for the month, . . . . 80.3 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, . . 5.0 



Computed Mean Dew-point for the month, .. .. .. 77.8 



Mean Dry Bulb Thermometer above computed mean Dew-point, . . 7.5 



Inches. 

 Mean Elastic force of Vapour for the month, . . . . 0.934 



Troy grains. 

 Mean Weight of Vapour for the month, . . . . . . 9.97 



Additional Weight of Vapour required for complete saturation, .. 2.67 



Mean degree of humidity for the month, complete saturation being unity, 0.79 



Inches. 

 Earned 15 days, Max. fall of rain during 24 hours, . . . . 2.51 



Total amount of rain during the month, . . . . . . 10.30 



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



