Meteorological Observations, 



xlvii 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General* s Office, Calcutta, 



in the month of June, 1864. 



Monthly Eesults. 



Mean height of the Barometer for the month, • . . . 



Max. height of the Barometer occurred at 8 A. M. on the 20th, 

 Min. height of the Barometer occurred at 4 p. m. on the 17th, 

 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, .. 



Inches 

 29.548 

 29.672 

 29.429 



0.243 

 29.600 

 29.486 



0.114 



Mean Dry Bulb Thermometer for the month, . . 

 Max. Temperature occurred at 2 p. m. on the 4th, 

 Min. Temperature occurred at 2 a. M. on the 30th, 

 Extreme range of the Temperature during the month, 

 Mean of the daily Max. Temperature, 

 Ditto ditto Min. ditto, .. 



' range of the Temperature during the month, 



o 



85.5 

 97.4 

 75.0 

 22.4 

 92.2 

 79.9 

 12.3 



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, .. 



80.8 



4.7 



77.5 



8.0 



Inches 



0.925 



Troy grains 

 Mean Weight of Vapour for the month, .. ,. .. 9.88 



Additional Weight of Vapour required for complete saturation, «,„ 2.84 



Mean degree of humidity for the month, complete saturation being unity, 0.78 



Inches 

 Rained 16 days, Max. fall of rain during 24 hours, ,. # . 7.06 



Total amount of rain during the month, .. .. .. 18.73 



Total amount of rain indicated by the gauge attached to the Anemo- 

 meter during the month, .. .. .. .., 17.93 



Prevailing direction of the W r ind, . . ., ., S. & S. E. 



