Meteorological Observations. xvi 



Abstract of the Results of the Hourly Meteorological Observations 

 taken at the Surveyor General's Office, Calcutta, 

 in the month of February 1875. 



Monthly Eesults. 



Indies. 



Mean height of the Barometer for the month ... ... ... 29.965 



Max. height of the Barometer occurred at 10 a. m. on the 4th ... 30.169 



Min. height of the Barometer occurred at 5 & 6 p. m. on the 28th ... 29.796 



Extreme range of the Barometer during the month ... ... 0.373 



Mean of the daily Max. Pressures ... ... ... ... 30.044 



Ditto ditto Min. ditto ... ... ... ... 29.906 



Mean daily range of the Barometer during the month ,., ... 0.138 



Mean Dry Bulb Thermometer for the month ... ... ... 72.0 



Max. Temperature occurred at 3 & 4 p. m. on the 24th ... ... 88.8 



Min. Temperature occurred at 6 & 7 A. M. on the 2nd ... ... 54.5 



Extreme range of the Temperature during the month ... ... 34.3 



Mean of the daily Max. Temperature ... ... ... ... 82.2 



Ditto ditto Min. ditto, ... ... ... ... 63.5 



Mean daily range of the Temperature during the month ... ... 18.7 



Mean Wet Bulb Thermometer for the month ... ... ... 64.0 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer 8.0 



Computed Mean Dew-point for the month ... ... ■ ... 57.6 



Mean Dry Bulb Thermometer above computed mean Dew-point ... 14.4 



Indies. 

 Mean Elastic force of Vapour for the month ... ... ... 0.483 



Troy grain. 

 Mean Weight of Vapour for the month ... ... iti 5 99 



Additional Weight of Vapour required for complete saturation ... 3.21 

 Mean degree of humidity for the month, complete saturation being unity 0.62 



o 

 Mean Max. Solar radiation Thermometer for the month ... ... 127.9 



Inches. 

 Drizzled 3 days, — Max. fall of rain during 24 hours ... ... Nil 



Total amount of rain during the month ... ... ]$[{ 



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

 meter during the month ... ... ... i#< pin 



Prevailing direction of the Wind ... E. N. E. N. N. W. & N. W. 



* Height 70 feot 10 inches above ground. 



