Meteorological Observations. 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General* s Office, Calcutta, 



in the month of January, 1859. 



Monthly Eesults. 



Mean height of the Barometer for the month, 

 Max. height of the Barometer, occurred at 10 a. m. on the 11th, 

 Min. height of the Barometer, occurred at 4 P. M. on the 26th, 

 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 month, 



Mean Dry Bulb Thermometer for the month, 

 Max. Temperature, occurred at 3 P. M. on the 31st, 

 Min. Temperature, occurred at 6 and 7 A. m. on the 22nd, 

 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,.. 



Mean Wet Bulb Thermometer for the month, 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, 



Computed Mean Dew Point for the month, 



Mean Dry Bulb Thermometer above computed Mean Dew Point, 



Mean Elastic force of vapour for the month, 



Inches. 

 30.002 

 30.163 

 29.851 



0.312 

 30.085 

 29.945 



0.140 



o 



69.1 



85.2 

 57.0 

 28.2 

 79.2 

 61.1 

 18.1 



o 

 63.3 



5.8 



60.4 



8.7 



Inches. 



0.530 



Troy grains. 

 Mean weight of vapour for the month, . . . . . . 5.84 



Additional weight of vapour required for complete saturation, . . 1.94 



Mean degree of Humidity for the month, complete saturation being unity, 0.75 



Rained No day. Max. fall of rain during 24 hours, 

 Total amount of rain during the month, 

 Prevailing direction of the Wind, 



Inches. 



Nil. 



Nil, 



W. & N. k N. W. 



