Meteoro log ica I Obserra Ions. 



i xxx IV 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General's Office, Calcutta, 



in the mouth of October 1868. 



Monthly Results. 



Mean height of the Barometer for the month... 



Max. height of the Barometer occurred at 9 a. m. on the 31st. 



Min. height of the Barometer occurred at 5 p.m. on the 6th. 



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. 



29.862 

 30.042 

 29.680 



0.362 

 29.929 

 29.811 



0.118 



Mean Dry Bulb Thermometer for the month 

 Max. Temperature occurred at 5 p. m. on the 14th. 

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

 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., 



82.2 

 92.1 

 70.8 

 21.3 

 88.1 

 77.3 

 10.8 



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 ... 



76.6 

 5.6 



. 72.7 

 9.5 



Inches. 



. 0.792 



Troy grain. 



Mean Weight of Vapour for the month ... ... ... 8.51 



Additional Weight of Vapour required for complete saturation ... 3.03 

 Mean degree of humidity for the month, complete saturation being unity 0.74 



Inch 



Rained 4 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 



es. 



1.31 

 1.53 



1.42 



Prevailing direction of the Wind.., 



s. w. & s. s. w 



