Meteorological Observations. 



xxul 



Abstract of Ike Results of the Hourly Meteorological Observations 

 taken at the Surveyor General's Office, Calcutta, 

 in the month of March 1870. 

 Monthly Results. 



Mean height of the Barometer for the month... 



Max. height of the Barometer occurred at 10 a. m. on the 18th. 



Min. height of the Barometer occurred at 4 p. m. on the 30th. 



Extreme range of the Barometer during the month 



Mean of the daily Max. Pressures 



Ditto ditto Min. ditto 

 Mean daily range of the Barometer during the mouth ... 



Inches. 



, 29.840 

 30.035 

 29.633 



. 0.402 



29.922 



29.775 



0.147 



Mean Dry Bulb Thermometer for the month 

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

 Min. Temperature occurred at 6 a. m, on the 1st. 

 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 



81.0 

 101.2 

 63.0 

 38.2 i 

 91.5 

 72.1 

 19.4 



Mean Wet Bulb Thermometer for the month ... ... ... 71.0 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer 10.0 



Computed Mean Dew-point for the month ... ... ... 64.0 



Mean Dry Bulb Thermometer above computed mean Dew-point ... 17.0 



Inches. 



Mean Elastic force of Vapour for the month ... ... ... 0.597 



Troy grain. 

 Mean Weight of Vapour for the month ... ... ... 6.42 



Additional Weight of Vapour required for complete saturation ... 4.72 

 Meaoi degree of humidity for the month, complete saturation being unity 0.58 



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



o 

 127.8 



Inches. 



... 0.03 

 Total amount of rain during the month ... ... ... 0.03 



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



Rained 5 days, — Max. fall of rain during 24 hours 



meter during the month 

 Prevailing direction of the Wind... 



Nil. 

 S.S.W. 



