xlix Meteorological Observations. 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General's Office, Calcutta, 



in the month oj June 187 o. 



Monthly Results. 



Indies. 



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



Max. height of the Barometer occurred at 9 p. m. on the 6th ... 29.682 



Min. height of the Barometer occurred at 4 p. m. on the 1st ... 29.325 



Extreme range of the Barometer during the month ... ... 0.357 



Mean of the daily Max. Pressures ... ... ... ... 29.561 



Ditto ditto Min. ditto ... ... ... ... 29.448 



Mean daily range of the Barometer during the month ... ... 0.118 



o 



Mean Dry Bulb Thermometer for the month ... ... ... 87.9 



Max. Temperature occurred at 3 y. m. on the 2nd ... ... 103.0 



Min. Temperature occurred at 6& 7 p. m, on the 13th ... ... 78.0 



Extreme range of. the Temperature during the month ... ... 25.0 



Mean of the daily Max. Temperature ... ... ... ... 96.1 



Ditto ditto Min. ditto, ... ... ... ... 82.0 



Mean daily range of the Temperature during the month ... ... 14.1 



Mean Wet Bulb Thermometer for the month ... ... ... 82.2 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer 5.7 



Computed Mean Dew-point for the month ... ... ... 78.8 



Mean Dry Bulb Thermometer above computed mean Dew-point ... 9.1 



Inches. 

 Mean Elastic force of Vapour for the month ... ... ... 0.964 



Troy grain. 

 Mean Weight of Vapour for the month ... ... ... 10.25 



Additional Weight of Vapour required for complete saturation ... 3.39 

 Mean degree of humidity for the month, complete saturation being unity 0.75 



o 



Mean Max. Solar radiation Thermometer for the month ... ... 141.4 



Inches. 



Rained 16 days, — Max. fall of rain during 24 hours' ... ... 1.64 



Total amount of rain during the month ... ... ... 4.30 



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

 meter during the month ... ... ... ,.. ... 3.44 



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



* Height 70 feet 10 inches above ground. 



