Met euro log ica I Observation $. 



Abstract of the Results of the Hourly Meteorological Observations 

 taken at the Surveyor General's Office, Calcutta, 

 in the month of June 1870. 

 Monthly Results. 



Indies. 



Mean height of the Barometer for the month... ... ... 29.604 



Max. height of the Barometer occurred at 9 a. m. on the 6th. ... 2 



Min. height of the Barometer occurred at 5 r. m. on the lUtli. ... 2 ( .).23<> 



Extreme range oi the Barometer during the month ... ... 0.532 



Mean of the daily Max. Pressures ... ... ... ... - 



Ditto ditto Min. ditto ... ... ... ... 29.535 



Mean daily range of the Barometer during the month ... ... 0.133 



Mean Dry Bull) Thermometer for the month 

 Max. Temperature occurred at 1 & 2 p. if. on the 1st. 

 Min. Temperature occurred at 9 P. M. on the 1st. 

 Extreme range of the Temperature during the month 

 Mean of the daily ]\lax. Temperature ... 



Ditto ditto Min. ditto, 

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



81,7 

 97.5 

 76.5 

 21.0 

 90.6 

 79.* 

 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 Yapour for the month 



80.4 

 4.3 



77.4 

 7.3 



Inches. 

 , 0.992 



Mean Weight of Yapour for the month 



Troy grain. 

 ... 9.87 



Additional Weight of Yapour required for complete saturation ... 2*55 

 Mean degree of humidity for the month, complete saturation being unity 0.80 



Mean Max. Solar radiation Thermometer for the month 



o 

 125.7 



Inches, 



Rained 20 days, — Max. fall of rain during 24 hours ... ... 4.39 



Total amount of rain during the month ... ... ... 16.09 



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

 meter during the month ... ... ... ... ... 14.59' 



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



* Height 70 feet 10 inches above ground. 



