Meteorological Observations. 



lxiii 



Abstract of tie Results of the Hourly Meteorological Observations 



taken at the Surveyor General's Office, Calcutta, 



in the month of August, 1864. 



Monthly Eesults. 



Mean height of the Barometer for the month, 

 Max. height of the Barometer occurred at 9 A. M. on the 29th, 

 Min. height of the Barometer occurred at 8 p. m. on the 13th, 

 Extreme range of the Barometer during the month, # . 



Mean of the Daily Max. Pressures,.. .. %m 



Ditto ditto Min. ditto, .. 

 Mean daily range of the Barometer during the month, 



Inches 

 29.621 

 29.810 

 29.269 



0.541 

 29.679 

 29.557 



0.122 





Mean Dry Bulb Thermometer for the month, . . , 



Max. Temperature occurred at 2, 3 & 4 p. M. on the 30th,, 

 Min. Temperature occurred at Midnight on the 22nd, 

 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, .. 



o 



83.3 

 92.2 



77.0 

 15.2 

 87.6 

 80.0 



7.6 



79.8 

 3.5 



77.3 



6.0 



Inches 



0.919 



Troy grains 

 Mean Weight of Vapour for the month, .. .. mm Qgg 



4-dditional Weight of Vapour required for complete saturation, , , 2.07 



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



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

 Total amount of rain during the month, 



Total amount of rain indicated by the gauge attached to the Aneomo- 

 meter during the month, 



Inches 



3.60 



16.64 



Prevailing direction of the Wind, . , 



17.35 



& <& S, W, 



