xxii Meteorological Observations. 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General's Office, Calcutta, 



in the month of March, 1857. 



Monthly Eesults. 



Inches. 

 Mean height of the Barometer for the month, ... ... 29.835 



Max. height of the Barometer, occurred at 10 A. M. on the 9th, ... 30.080 



Min. height of the Barometer, occurred at 6 p. m. on the 28th, ... 29.583 



Extreme Range of the Barometer during the month, ... ... 0.497 



o 



Mean Dry Bulb Thermometer for the month, ... ... 80.5 



Max. Temperature, occurred at 4 P. M. on the 27th, ... ... 100.2 



Min. Temperature, occurred at 6 A. M. on the 11th, ... ... 64-8 



Extreme Range of the Temperature during the month, ... ... 35.4 



o 



Mean Wet Bulb Thermometer for the month, ... ... 72.7 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, ... 7.8 



Computed Mean Dew Point for the month, ... ... 68.8 



Mean Dry Buib Thermometer above computed Mean Dew Point, ... 11.7 



Inches. 

 Mean Elastic force of vapour for the month, ... ... ... 0.699 



Troy grains. 

 Mean weight of vapour for the month, ... ... ... 7.52 



Additional weight of vapour required for complete saturation, ... 3.46 



Mean degree of Humidity for the month, complete saturation being unity, 0.69 



Inches. 

 Rained 3 days. Max. fall of rain during 24 hours, ... ... 0.52 



Total amomit of rain during the month, ... ... ... 0.96 



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



