Jtfeteorologicál Observations. xxxix 



Absiract of the llesults of the Hourly Meteorological Observations 

 talcen at the Surveyor General 1 s Office, Caleutta, 

 in the month of September, 1860. 



MONTHLY EESULTS. 



Mean height of the Barometer for the month, 



Max. height of the Barometer occurred at 10 A. M. on the 28th, 



Min. height of the Barometer occurred at 4 A. M. on the 20th, 



Extreme range of the Barometer during the month, 



Mean of tha Daily Max. Pressures, 



Ditto ditto Min. ditto, 

 Mean daily range of the Barometer during the month, 



Inches 

 29.667 

 29.796 

 29.417 



0.379 

 29.730 

 29.600 



0.130 



Mean Dry Bulb Thermometer for the month, 



Max. Temperature occurred at 2 & 3 P. M. on the 22nd & 29th, 



Min. Temperature occurred at 4 A. M. on the 21st, 



Extreme range of the Temperature during the month, 



Mean of the daily Max. Temperature, 



Ditto ditto Min. ditto, 

 Mean dailg 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 forcé of Vapour for the month, 



o 



83.4 

 91.2 



77.2 

 14.0 

 88.5 

 80.3 



8.2 

 80.4 



3.0 

 78.9 



4.5 



Inches 

 0.967 



Troy grains 

 10.37 



Mean Weight of Yapour for the month, 



Additional Weight of Vapour required for complete saturation, .. 1.59 



Mean degree of humidity for the month, complete saturation being unity, 0.87 



Eained 19 days, Max. fall of rain during 24 hours, 

 Total amount of rain during the month, 

 Brevailing direction of the Wind, .. 



Inches 

 1.46 

 7.13 



S. &E.&S. E. 



