Meteorological Observations. xxiii 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor GeneraVs OfficCy Calcutta, 



ill the- month of March 1872. 



Monthly Eesults. 



Indies. 



Mean height of the Barometer for the month ... ... ... 29.845 



Max. height of the Barometer occurred at 10 a. m. on the 4th. ... 30.094 



Min. height of tlie Barometer occurred at 4 p. m. on the 29th. ... 29.610 



Extreme range oi the Barometer during the month ... ... 0.448 



Mean of the dailj Max. Pressures ... ... '... ... 29.9i9 



Ditto ditto Min. ditto ... ... ... ... 29.773 



Jf<?a7t c?a% r«;j^e of the Barometer during the month ... ... 0.1 46 



o 



Mean Dry Bulb Thermometer for the month ... ... ... 82.7 



Max. Temperature occurred at 4 p. M. on the 27th. ... ... 98.5 



Min. Temperature occurred at 6 & 7 a. m, on the 7th ... ... 69.5 



Extreme range oi the Temperature during the month ... ... 29.0 



Mean of the daily Max. Temperature ... ... ... ... 92.7 



Ditto ditto Min. ditto, ... ... ... ... 75.4 



Mean daily range oi the Temperature during the month ... ... 17.3 



Mean Wet Bulb Thermometer for the month ... ... ... 74.9 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer 7.8 



Computed Mean Dew-point for the month ... ... ... 69.4 



pVIean Dry Bulb Thermometer above computed mean Dew-point ... 13.3 



Inches. 

 Mean Elastic force of Vapour for the month ... ... ... 0.713 







Troy grain. 

 Mean Weight of Vapour for the month ... ... ... 7.66 



Additional Weight of Vapour required for complete saturation ... 4.06 

 Mean degree of humidity for the month, complete satiu'ation being unity 0.65 



o 



WL Mean Max. Solar radiation Thermometer for the month ... ... 140.6 



Inches. 

 Eained 3 days,— Max. fall of rain during 24 hours ... ... 021 



Total amount of rain during the month ... ... ... 0.21 



Total amount of rain indicated by the Gauge* attached to the anemometer 

 during the month ... ... ... ... ... ... 0.16 



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



* Height 70 feet 10 inches abore ground. 



