Meteorological Observations. 



Iv 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General's Office, Calcutta, 



in the month of July, 1858. 



Monthly Results. 



Mean height of the Barometer for the month, 



Max. height of the Barometer occurred at 10 A. M. on the 31st, 



Min. height of the Barometer occurred at 4 A. M. on the 24th, 



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, . . 



Inches. 

 29.566 

 29.724 

 29.263 



0.461 

 29.620 

 29.505 



0.115 



Mean Dry Bulb Thermometer for the month, 

 Max. Temperature occurred at 2 p. M. on the 6th, 

 Min. Temperature occurred at 6 a. m. on the 23rd, 

 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 Yap our for the month, 



o 



83.8 

 93.7 

 78.0 

 15.7 

 89.1 

 80.3 

 8.8 



o 



80.4 

 3.4 



78.7 



5.1 



Inches. 



0.961 



Troy grains. 

 Mean Weight of Vapour for the month, .. .. .. 10.31 



Additional Weight of Vapour required for complete saturation, . . 1.79 



Mean degree of humidity for the month, complete saturation being unity, 0.85 



Eained 25 days, Max. fall of rain during 24 hours, 

 Total amount of rain during the month, 

 Prevailing direction of the Wind, 



Inches. 



3 04 



17.96 



S. & E. & S. E. 



