Meteorological Observations. 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor GeneraVs Office, Calcutta, 



in the month of May, 18 64. 



Monthly Eesults. 



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 5 P. M. on the 24th, 

 Extreme range of the Barometer during the month, # . 



Mean of the Daily Max. Pressures,.. .. mm 



Ditto ditto Min. ditto, .. 

 Mean daily range of the Barometer during the month, 



Indies 

 29.729 

 29.947 

 29.500 



0.447 

 29.798 

 29.655 



0.143 



Mean Dry Bulb Thermometer for the month, . . 

 Max. Temperature occurred at 4 p. m. on the 24th, 

 Min. Temperature occurred at 8 p. m. on the 17th, 

 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, 



o 



84,6 

 104.2 

 73.0 

 31.2 

 95.2 

 77.2 

 18.0 



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, 



77.5 



7.1 



72,5 



12.1 



Inches 



0.787 



Troy grains 

 Mean Weight of Vapour for the month, . . . . \ % 8 42 



Additional Weight of Vapour required for complete saturation, , , 3.97 



Mean degree of humidity for the month, complete saturation being unity, 0.68 



Rained 18 days, Max. fall of rain during 24 hours, 

 Total amount of rain during the month 

 Prevailing direction of the Wind, .. 



Inches 



3.10 



10.36 



S. &S. E. 



