Meteorological Observations, 



Abstract of tlie Results of the Hourly Meteorological Obser 

 taken at the Surveyor General* s Office, Calcutta, 

 in the month of July, 1864. 



Monthly Eesxjlts. 



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



Max. height of the Barometer occurred at 10 p. m. on the 29th, •• 



Min. height of the Barometer occurred at 2 & 3 P. M. on the 21st, 

 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 3 .. •• 



lv 



vations 



Inches 

 29.505 

 29.669 

 29.313 



0.356 

 29.558 

 29.448 



0.110 



; 



.. 



Mean Dry Bulb Thermometer for the month, . • 

 Max. Temperature occurred at 2 P. M. on the 19th, 

 Min. Temperature occurred at 5 a. m. on the 5th, 

 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 



83.4 

 91.2 

 76.8 

 14.4 

 87.6 

 80.1 

 7.5 



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-pointy 



Mean Elastic force of Vapour for the month, .. 



79.9 

 3.5 



77.4 



6.0 



Inches 



0.922 



Troy grains 

 Mean Weight of Vapour for the month, . . . . . . 9.89 



Additional Weight of Vapour required for complete saturation, . . 2.07 



Mean degree of humidity for the month, complete saturation being unity, 0.83 



Inches 

 Rained 27 days, Max. fall of rain during 24 hours, „. .. 3.13 



Total amount of rain during the month, . . .. .. 13.09 



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



meter during the month, .. •• .. .. 13,42 



Prevailing direction of the Wind 9 . , •• M S. 



m 



