Meteorological Observations. 



xv 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General 1 s Office, Calcutta, 

 in the month of Jane, 1860. 



MONTHLT EESULTS. 



Inches 



Mean height of the Barometer for the month, .. .. 29.544 



Max. height of the Barometer occurred at Midnight on the 7th, . . 29.742 



Min. height of the Barometer occurred at 4 p. M. on the 16th, .. 29.293 



"Extreme range of the Barometer during the month, . . ... 0.449 



Mean of the daily Max. Pressures, . . . . . . 29.601 



Ditto ditto Min. ditto, .. .. .. 29.482 



Mean daily range of the Barometer during the month, .. .. 0.119 



Mean Dry Bulb Thermometer for the month, 

 Max. Temperature occurred at 1 p. m. on the lst, 

 Min. Temperature occurred at 3 p. M. on the 19th, 

 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 ? 



o 



84.9 

 99.2 

 77.0 

 22.2 

 91.7 

 79.9 

 11.8 



Mean Wet Bulb Thermometer for the month, 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, . 



Computed Mean De w-point for the month, .. 



Mean Dry Bulb Thermometer above computed Mean Dew-point, 



Mean Elastic forcé of Vapour for the month, 



o 



80.6 

 4.3 



78.4 



6.5 



Inches 



0.952 



Troy grains 

 Mean Weight of Vapour for the month, ~. .. .. 10.17 



Additional Weight of Vapour required for complete saturation, . . 2.32 



Mean degree of humidity for the month, complete saturation being unity, 0.81 



Rained 21 days, Max. fall of rain during 24 hours, 

 Total amount of rain during the month, 

 Prevailing direction of the Wind, 



Inches 



1.32 



6.46 



S. & E. 



