Meteorological Observations. 



Absirmi of the Results of the Hourly Meteorological Ohservation® 



taken at the Surveyor QeneraVs Office, Calcutta, 



in the month of April, 1864. 



Monthly Eesxtlts. 



Mean height of the Barometer for the month, 

 Max. height of the Barometer occurred at 10 A. M. on the 2nd, 

 Min. height of the Barometer occurred at 5 P. M. on the 27th, 

 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 26th, 

 Min. Temperature occurred at 4 a. m. on the 9th, 

 '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 Yapour for the month, .. 



Inches 

 29.741 

 29.939 

 29.555 



0.384 

 29.819 

 29.669 



0.150 



o 



85.6 

 103.6 



72.8 

 30.8 

 96.2 

 77.6 

 18.6 



Inches 



76.2 



9.4 



69.6 



16.0 



Inches 



0.717 



Troy grains 

 Mean Weight of Vapour for the month, . . . . . . 7.65 



Additional Weight of Vapour required for complete saturation, . . 5.11 



Mean degree of humidity for the month, complete saturation being unity, 0.60 



Bained 8 days, Max. fall of rain during 24 hours, 

 Total amount of rain during the month, 



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

 meter during the month, • • • • • • • » 



Prevailing direction of the Wind, ., .« «• S. 



Inches 

 0.78 

 1.11 



0.93 



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