Meteorological Observations. 



Ixni 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General" s Office, Calcutta, 



in the month of August, 1858. 



Monthly Results, 



Mean height of the Barometer for the month, 

 Max. height of the Barometer occurred at 10 A. M. on the 14th, 

 Min. height of the Barometer occurred at 4 p. m. on the 9th, 

 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 monthy 



Inches. 

 29.558 

 29.735 

 29.357 



0.378 

 29.613 

 29.497 



0.116 



Mean Dry Bulb Thermometer for the month, 

 Max. Temperature occurred at 3 P. m. on the 4th and 5th, 

 Min. Temperature occurred at 8 and 10 p. m. on the 16th, 

 Extreme range of the Temperature during the month, . . 

 Mean of the daily Max. Temperatures, 

 Ditto ditto Min. ditto, 

 Mean daily range of the Temperatures 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 



83.6 

 92.6 



77.6 

 15.0 

 88.3 

 80.2 

 8.1 



o 



80.3 



3.3 



78.6 



5.0 



Inches. 



0.958 



Troy grains. 

 Mean Weight of Yapour for the month, .. .. .. 10.28 



Additional Weight of Vapour required for complete saturation, . . 1.75 



Mean degree of humidity for the month, complete saturation being unity, 0.86 



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

 Total amount of rain during the month, 

 Prevailing direction of the Wind, 



Inches, 



3.16 



14.65 



S. & S. E, 



