Meteorological Observations. 



lxxix 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General* s Office, Calcutta, 



in the month of October 1867. 



Monthly Results. 



Mean height of the Barometer for the month... 

 Max. height of the Barometer occurred at 9 a. m. on the 16th 

 Min. height of the Barometer occurred at 3 p.m. on the 12th 

 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. 



29.880 

 . 30.008 



29.755 

 , 0.253 



29.942 

 . 29.821 

 , 0.121 



Mean Dry Bulb Thermometer for the month 

 Max. Temperature occurred at 1 & 3 p. M.on the 8th & 11th. 

 Min. Temperature occurred at 6 a. m. on the 29th & 30th .. 

 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... 



81.2 

 90.0 

 69.5 

 20.5 

 86.8 

 76.9 

 9.9 



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 ... 



76.9 

 4.3 



73.9 

 7.3 



Inches. 

 0.824 



Troy grain. 



Mean Weight of Vapour for the month ... ... ... 8.88 



Additional Weight of Vapour required for complete saturation ... 2.33 

 Mean degree of humidity for the month, complete saturation being unity 0.79 



Rained 10 days, — Max. fall of rain during 24 hours 



Total amount of rain during the month 



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



meter during the month 

 Prevailing direction of the Wind 1S T . E. & E. Is T . E. 



Inches. 



2.43 



8.45 



8.01 



