Meteorologica I Observations* 



lxxi 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General* 8 Office, Calcutta, 



in the month of September, 1864. 



Monthly Eestjlts. 



Mean height of the Barometer for the month, 

 Max. height of the Barometer occurred at 10 A. M. on the 26th, 

 Min. height of the Barometer occurred at 4 a. m. on the 10th, 

 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 

 29.684 

 29.983 

 29.341 



0.642 

 29.749 

 29.615 



0.134 



Mean Dry Bulb Thermometer for the month, . . 

 Max. Temperature occurred at 1 p. m. on the 8th, 

 Min. Temperature occurred at 5 a. m. on the 21st, 

 '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, 



83.8 

 93.0 



77.9 

 15.1 

 88.7 

 80.4 

 8.3 



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 Yapour for the month, .. 



80.1 



3.7 



77.5 



6.3 



Inches 



0.925 



Troy grains 

 Mean Weight of Yapour for the month, .. ,. ,. 9 t 92 



Additional Weight of Yapour required for complete saturation, .. 2.18 



Mean degree of humidity for the month, complete saturation being unity, 0.82 



Bained 17 days, Max. fall of rain during 24 hours, ., mm 



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, .. 



Inches 



2.34 



12.59 



11.54 



S. & S. E. 



