Meteorológica! Observaticns. 



Ahstract of tlie Besults of the Hourly Meteorological Olservations 



tdken at the Surveyor OeneraVs Office, Calcutia, 

 in the month of April, 1860. 



Monthly Besults. 



Inclies 



Mean height of tlie Barometer for the month, .. .. 29.759 



Max. lieight of the Barometer occurred at 11 p. M. on the 18th, . . 29.921 



Min. height of the Barometer occurred at 4 P. M. on the 30th, . . 29.608 



'Extreme range of the Barometer during the month, .. ' .. 0.313 



Mean of the daily Max. Pressures, . . . . . . 29.826 



Ditto ditto Min. ditto, .. .. .. 29.684 



Mean daily range of the Barometer during the month, . . . . 0.142 



o 



Mean Dry Bulb Thermometer for the month, . . . . 84,9 



Max. Temperature occurred at 2 p. m. on the 30th, .. .. 100.8 



Min. Temperature occurred at 6 A. M. onthe lSth, .. .. 72.2 



Extreme range of the Temperature during the month, . . . . 28.6 



Mean of the daily Max. Temperature, .. .. .. 94.2 



Ditto ditto Min. ditto, .. .. .. 77.3 



Mean daily range of the Temperature during the month, . . 16.9 



o 

 Mean Wet Bulb Thermometer for the month, . . . . 78.2 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, . . 6.7 



Computed Mean De vr-point for the month, .. .. .. 74.8 



Mean Dry Bulb Thermometer above computed Mean Dew-point, .. 10.1 



Inch.es 

 Mean Elastic forcé of Vapour for the month, . . . . 0.819 



Troy grama 

 Mean Weight of Yapour for the month, . . . . . . 9.07 



Additional Weight of Vapour required for complete saturation, . . 3.42 



Mean degree of humidity for the month, complete saturation being unity, 0.73 



Inches 

 Eained 8 days, Max. fall of rain during 24 hours, .. .. 1.02 



Total amount of rain during the month, . . . . . . 2.47 



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



