lix Meteorological Observations. 



Abstract of the Results of the Hourly Meteorological Observations 

 taken at the Surveyor General's Office, Calcutta, 

 in the month of July 1875. 



Monthly Results. 



Inches. 



Mean height of the Barometer for the month ... ... ... 29.508 



Max. height of the Barometer occurred at 9 a. M. on the 7th ... 29.744 



Min. height of the Barometer occurred at 6 p. m. on the 14th ... 29.210 



Extreme range of the Barometer during the month ... ... 0.534 



Mean of the daily Max. Pressures ... ... ... ... 29.565 



Ditto ditto Min. ditto ... ... ... ... 29.444 



Mean daily range of the Barometer during the month ... ... 0.121 



o 



Mean Dry Bulb Thermometer for the month ... .., ... 83.2 



Max. Temperature occurred at 3 ?. M. on the 19th. ... ... 92.6 



Min. Temperature occurred at 7 a. m. on the 14th ... ... 77.4 



Extreme range of the Temperature during the month ... ... 15.2 



Mean of the daily Max. Temperature ... ... .,, ... 87.8 



Ditto ditto Min. ditto, ... ... ... ... 80.0 



Mean daily range of the Temperature during the month ... ... 7.8 



Mean Wet Bulb Thermometer for the month ... ... ... 80.3 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer 2.9 



Computed Mean Dew-point for the month ... ... ... 78.3 



Mean Dry Bulb Thermometer above computed mean Dew-point ... 4.9 



Inches. 

 Mean Elastic force of Vapour for the month ... ... ... 0.949 



Troy grain. 

 Mean Weight of Vapour for the month ... ... ... 10.18 



Additional Weight of Vapour required for complete saturation ... 1.71 

 Mean degree of humidity for the month, complete saturation being unity 0.86 



o 

 Mean Max. Solar radiation Thermometer for the month ,., ... 138.9 



Inches. 

 Rained 27 days, — Max. fall of rain during 24 hours ... ... 3.33 



Total amount of rain during the month ... ... ... 13.90 



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

 meter during the month ... ... ,,, ... ... 12.37 



Prevailing direction of the Wind ,,, S. & S. S. W. 



* Height 70 feet 10 inches above ground. 



