Meteor olog lea I Ohserva Hon ?. 



lviii 



Abstract of the Results of the Hi urly Meteorological Observations 

 taken at the Surveyor General's Office, Calcutta, 

 in the month of July 1870. 

 Monthly Results. 



Inches. 



Mean height of the Barometer for the month... ... ... 29.522 



Max. height of the Barometer occurred at 10 a. m. on the 10th. ... 29.695 



Min. height of the Barometer occurred at 3 p. m. on the 31st. ... 29.324 



Extreme range of the Barometer during the month ... ... 0.371 



Mean of the daily Max. Pressures ... ... ... ... 29.573 



Ditto ditto Min. ditto ... ... ... ... 29.462 



Mean daily range of the Barometer during the month ... ... 0.111 



Mean Dry Bulb Thermometer for the month 

 Max. Temperature occurred at 1 p. m. on the 14th. 

 Min. Temperature occurred at 9 p. m, on the 31st. 

 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... 



83.9 

 93.7 



78.5 

 15.2 



89.2 



80.5 



8.7 



Mean "Wet Bulb Thermometer for the month ... ... ... 80.9 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer 3.0 



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



Mean Dry Bulb Thermometer above computed mean Dew-point ... 5.1 



Inches. 

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



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



Troy grain. 



Mean Weight of "Vapour for the month ... ... ... 10.34 



Additional Weight of Vapour required for complete saturation ... 1*79 

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



o 

 125.2 



Inches. 



Rained 26 days, — Max. fall of rain during 24 hours ... ... 2.36 



Total amount of rain during the month ... ... ... 10.90 



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

 meter during the month ... ... ... ... ... 9.93 



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



* Height 70 feet 10 inches above ground. 



