MefeoroJogical Observations. vH 



Abstract of the Bemlts of the Hourly Meteorological Observations 



taken at the Surveyor General's Office^ Calciitta, 



in the month of January 1877. 



Monthly Eesults. 



Indies. 



Mean height of tlie Barometer for tlie month ... ... ... 30.096 



Max.heiglitof the Barometer occurred at 10 a. M. on tlie 16th ... 30.301 



Min. height of tlie Barometer occurred at 4 p. m. on the 31st ... 29.908 



Sxtreme range of the Barometer during the month ... ... 0.393 



Mean of the daily Max. Pressures ... ... ... ... 30.171 



Ditto ditto Min. ditto ... ... ... ... 30.040 



Mean daily range of the Barometer during the month ... ... 0.131 



o 



Mean Dry Bulb Thermometer for the month ... ... ... 67.7 



Max. Temperature occurred at 3 p. m. on the 30th ... ... 83.0 



Min. Temperature occurred at 7 a. m. on the 1st & 15th ... ... 57.5 



Extreme range o^ the Temperature during the month ... ... 25.5 



Mean of the daily Max. Temperature ... ... ... ... 76.1 



Ditto ditto Min. ditto, ... ... ... ... 60.7 



Mean daily range of the Temperature during the month ... ... 15.4 



Mean Wet Bulb Thermometer for the month ... ... ... 62.5 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer 5.2 



Computed Mean Dew-point for the month ... ... ... 58.3 



Mean Dry Bulb Thermometer above computed mean Dew-point ... 9.4 



Inches. 

 Mean Elastic force of Vapour for the month ... ... ... 0.494 



Grain. 

 Mean Weight of Vapour for the month ... ... ... 5.46 



Additional Weight of Vapour required for complete saturation ... 2.00 

 Mean degree of humidity for the month, complete saturation being unity 0.73 



o 

 Mean Max. Solar radiation Thermometer for the month ... ,., 128.4 



Inches. 



Eained 7 days, — Max. fall of rain during 24 hours ... ... 1.94 



Total amount of rain during the month ... ... ... 2.90 



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

 meter during the month ... ... ... out of order 



Prevailing direction of the Wind ... ... ,,, N&NW 



* Height 70 feet 10 inches above ground. 



