Meteorologica I Observa ti&ns. 



XXX 11 



Abstract of the Results of the Hourly Meteorological Observations 

 taken at the Surveyor General's Office, Calc?itta, 

 in the month of October 1870. 

 Monthly Results. 



Mean height of the Barometer for the month... 



Max. height of the Barometer occurred at 9 a. m. on the 21st. 



Min. height of the Barometer occurred at 4 p. m. oh the 5th. 



Extreme range of the Barometer during the mouth 



Mean of the daily Max. Pressures 



Ditto ditto Min. ditto 

 Mean dally range of the Barometer during the month ... 



Inches. 



. 20.825 

 . 29.986 

 . 29.662 

 . 0.306 

 . 29.89 L 

 . 29.766 

 . 0.125 



Mean Dry Bulb Thermometer for the month 

 Max. Temperature occurred at 2 & 3 p. m. on the 21st. 

 Min. Temperature occurred at 2, 3 & 4 a. m, on the 21th. 

 Extreme range of the Temperature during the month 

 Mean of the daily Max. Temperature ... 



Ditto ditto Min. ditto, 

 Mean dally range of the Temperature during the month. 



82.4 

 91.6 



75.0 

 16.6 

 87.9 

 78.5 

 9.4 



Mean Wet Bulb Thermometer for the month ... 



Mean Dry Bulb Thermometer above Mean. Wet Bulb Thermomet* 



Computed Mean Dew-point for the month 



Mean Dry Bulb Thermometer above computed mean Dew-point , 



Mean Elastic force of Yapour for the month 



. 78.7 

 3.7 



, 76.1 

 6.3 



Inches. 



, 0.885 



Troy grain. 



Mean Weight of Yapour for the month ... ... ... 9.51 



Additional Weight of Yapour required for complete saturation ... 2 - l(> 

 Mean degree of humidity for the month, complete saturation being unity 0.82 



Mean Max. Solar radiation Thermometer for the month 



o 

 14-1.9 



Inches. 



Rained 12 days, — Max. fall of rain during 24 hours ... ... 0.96 



Total amount of rain during the month ... ... ... 3.93 



Total amount of rain indicated by the Gauge* attached to the anemo- 

 meter during the month ... ... ... ... ... 3.74 



Prevailing direction of the Wind S SE&S 



* Height 70 feet 10 inches above ground. 



