Meteorological Observations. 



Abstract of the Results of the Hourly Meteorological Observations 



talcen at the Surveyor General's Office, Calcutta, 



in the month of March, 1858. 



Monthly Eesults. 



Mean height of the Barometer for the month, 

 Max. height of the Barometer, occurred at 9 a. m. on the 20th , 

 Min. height of the Barometer, occurred at 5 P. M. on the 30th, 

 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, 



Mean Dry Bulb Thermometer for the month, 

 Max. Temperature, occurred at 3 p. m. on the 18th, 

 Min. Temperature, occurred at 6 & 7 A. M. on the 5th, 

 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 month, 



Mean Dry Bulb Thermometer above computed Mean Dew Point, 



Mean Elastic force of vapour for the month, 



Inches. 

 29.849 

 30.016 

 29.686 



0.330 

 29.930 

 29.781 



0.149 



o 

 81.3 

 97.0 

 67-0 

 30.0 

 91.5 

 736 

 17.9 



o 



72.7 



8.6 



68.4 



12.9 



Inches. 



0.690 



Troy grains. 

 Mean weight of vapour for the month, . . . . . . 7.42 



Additional weight of vapour required for complete saturation, . . 3.82 



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



Eained 4 days. Max. fall of rain during 24 hours, 

 Total amount of rain during the month, 

 Prevailing direction of the Wind, . . - 



Inches. 

 0.22 

 0.22 



s. & s. w. 



