Meteorological Observations. 



lxxxvii 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General's Office, Calcutta, in the 



month of November 1866. 



Monthly Eesults. 



Mean height of the Barometer for the month... 

 Max. height of the Barometer occurred at 9 a.m. on the 17th 

 Min. height of the Barometer occurred at 3 p. m. on the 10th 

 '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. 



29.988 

 30.163 

 29.786 



0.377 

 30.053 

 29.930 



0.123 



Mean Dry Bulb Thermometer for the month 

 Max. Temperature occurred at 3 p. m. on the 3rd 

 Min. Temperature occurred at 7 a. m. on the 27th 

 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. 



76.1 



88.6 

 62.0 

 26.6 

 83.4 

 69.8 

 13.6 



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 



69.5 



6.6 



64.9 



11.2 



Inches. 

 0.615 



Troy grain. 



Mean Weight of Vapour for the month ... ... ... 6.70 



Additional Weight of Vapour required for complete saturation ... 2.93 

 Mean degree of humidity for the month, complete saturation being unity 0.70 



Inches. 



Drizzled 2 days, — Max. fall of rain during 24 hours ... ... Nil 



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



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

 meter during the month ... ... ... ... ... Nil 



N.W.N. N.W.&N. 



Prevailing direction of the Wind 



