Meteorological Observations. 



lv 



Abstract of the Results of the Hourly Meteorological Observations 



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



month of July 1866. 



Monthly Kesults. 



Mean height of the Barometer for the month,... 



Max. height of the Barometer occurred at 10 a. m. on the 14th, 



Min. height of the Barometer occurred al 3 p. m. on the 9th, 



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. 



29.587 

 29.714 

 29.433 



0.281 

 29.637 

 29.527 



0.110 



Mean Dry Bulb Thermometer for the month, 

 Max. Temperature occurred at 3 p. m. on the 9th 

 Min. Temperature occurred at 5 a. m. on the 3rd ... 

 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,.. 





.. 83.1 





.. 93.2 





.. 74.4 





.. 18.8 





.. 88.0 





.. 79.7 





8.3 



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, 



80.1 

 3.0 



78.0 

 5.1 



Inches. 

 0.940 



Troy grain. 



Mean Weight of Vapour for the month ... ... ... 10.09 



Additional Weight of Vapour required for complete saturation, ... 1.77 

 Mean degree of humidity for the month, complete saturation being unity 0.85 



Pained 26 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- 



Inches. 



,. 3.43 

 . 13.42 



meter during the month. 

 Prevailing direction of the Wind, 



S. & S. S. E. & S. E. 



12.06 



