VI 



Meteorological Observations. 



Abstract of the Results of the Hourly Meteorological Observation*, 



taken at the Surveyor GeneraVs Office, Calcutta, 



in the month of October, 1856. 



Monthly Eestjlts. 



Mean height of the Barometer for the month, 

 Max. height of the Barometer, occurred at 10 A. M. on the 27th, 

 Min. height of the Barometer, occurred at 3 a. m. on the 11th, 

 Extreme Range of the Barometer during the month, 



Inches. 

 29.793 

 29.982 

 29.577 

 0.405 



Mean Dry Bulb Thermometer for the month, 

 Max. Temperature, occurred at 3 & 4 P. M. on the 6th, 

 Min. Temperature, occurred at 7 A. m. on the 23rd, 

 Extreme Range of the Temperature during the month, 



o 



81.0 

 90.4 

 720 



18.4 



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, ... 



77.2 



3.8 



75.3 



5.7 



Inches. 



0.862 



Troy grains. 

 Mean weight of vapour for the month, ... ... ... 9.29 



Additional weight of vapour required for complete saturation, ... 1.85 



Mean degree of Humidity for the month, complete saturation being unity, 0.83 



Rained 15 days. Max. fall of rain during 24 hours, 

 Total amount of rain during the month, 

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



Inches. 

 2.13 

 9.21 



